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121 results on '"Department of Applied Physics and Photonics [Brussels] ( TONA )"'

1. Attractor hopping between polarization dynamical states in a vertical-cavity surface-emitting laser subject to parallel optical injection

Author: Florian Denis-le Coarer, Luis Pesquera, Angel Valle, Miguel A. Rodríguez, Krassimir Panajotov, Ana Quirce, Marc Sciamanna, Methuselah Foundation, Research Foundation - Flanders, European Commission, Ministerio de Economía y Competitividad (España), Laboratoire Matériaux Optiques, Photonique et Systèmes ( LMOPS ), CentraleSupélec-Université de Lorraine ( UL ), Chaire Photonique, CentraleSupélec-Université de Lorraine ( UL ) -CentraleSupélec-Université de Lorraine ( UL ), Instituto de Fisica de Cantabria ( IFCA ), Universidad de Cantabria [Santander]-Consejo Superior de Investigaciones Científicas [Spain] ( CSIC ), Instituto de Física de Cantabria ( CSIC-UC ), Instituto de Física de Cantabria, E-Content, Mondragon Unibertsitatea, Department of Applied Physics and Photonics [Brussels] ( TONA ), Vrije Universiteit [Brussel] ( VUB ), Applied Physics and Photonics, Brussels Photonics Team, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), CentraleSupélec-Université de Lorraine (UL)-CentraleSupélec-Université de Lorraine (UL), Instituto de Fisica de Cantabria (IFCA), Universidad de Cantabria [Santander]-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Instituto de Física de Cantabria (IFCA), Department of Applied Physics and Photonics [Brussels] (TONA), and Vrije Universiteit Brussel (VUB)
Subjects: VCSELs, Stochastic dynamical systems, 02 engineering and technology, Power law, Vertical-cavity surface-emitting laser, [SPI]Engineering Sciences [physics], 020210 optoelectronics & photonics, Laser dynamics, Polarization, Attractor, 0202 electrical engineering, electronic engineering, information engineering, [ SPI ] Engineering Sciences [physics], Spontaneous emission, [NLIN]Nonlinear Sciences [physics], ON-OFF INTERMITTENCY, SINGLE-MODE VCSELS, SEMICONDUCTOR-LASER, NONLINEAR DYNAMICS, MULTISTABILITY, COMPLEXITY, OPERATION, NOISE, PARAMETERS, MECHANISM, Multistability, [PHYS]Physics [physics], Physics, [ PHYS ] Physics [physics], [ NLIN ] Nonlinear Sciences [physics], Polarization (waves), Transverse mode, Fluctuations & noise, Chaos & nonlinear dynamics, Atomic physics, Coherence (physics)
Abstract: We present experimental and theoretical results of noise-induced attractor hopping between dynamical states found in a single transverse mode vertical-cavity surface-emitting laser (VCSEL) subject to parallel optical injection. These transitions involve dynamical states with different polarizations of the light emitted by the VCSEL. We report an experimental map identifying, in the injected power-frequency detuning plane, regions where attractor hopping between two, or even three, different states occur. The transition between these behaviors is characterized by using residence time distributions. We find multistability regions that are characterized by heavy-tailed residence time distributions. These distributions are characterized by a -1.83±0.17 power law. Between these regions we find coherence enhancement of noise-induced attractor hopping in which transitions between states occur regularly. Simulation results show that frequency detuning variations and spontaneous emission noise play a role in causing switching between attractors. We also find attractor hopping between chaotic states with different polarization properties. In this case, simulation results show that spontaneous emission noise inherent to the VCSEL is enough to induce this hopping., This work has been funded by the Ministerio de Economía y Competitividad (MINECO/FEDER, UE), Spain under project TEC2015-65212-C3-1-P. A.Q. acknowledges FWO for support from a Postdoc fellowship and K.P. is grateful to the Methusalem Foundation for financial support.
Published: 2018
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2. Polarization dynamics induced by parallel optical injection in a single-mode VCSEL

Author: Florian Denis-le Coarer, Hugo Thienpont, Ana Quirce, Luis Pesquera, Angel Valle, Krassimir Panajotov, Marc Sciamanna, Airbus, Fonds de la Recherche Scientifique (Fédération Wallonie-Bruxelles), Agence Nationale de la Recherche (France), Ministerio de Economía y Competitividad (España), European Commission, Laboratoire Matériaux Optiques, Photonique et Systèmes ( LMOPS ), CentraleSupélec-Université de Lorraine ( UL ), Chaire Photonique, CentraleSupélec-Université de Lorraine ( UL ) -CentraleSupélec-Université de Lorraine ( UL ), Instituto de Fisica de Cantabria ( IFCA ), Universidad de Cantabria [Santander]-Consejo Superior de Investigaciones Científicas [Spain] ( CSIC ), Instituto de Física de Cantabria ( CSIC-UC ), Instituto de Física de Cantabria, Department of Applied Physics and Photonics [Brussels] ( TONA ), Vrije Universiteit [Brussel] ( VUB ), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), CentraleSupélec-Université de Lorraine (UL)-CentraleSupélec-Université de Lorraine (UL), Instituto de Fisica de Cantabria (IFCA), Universidad de Cantabria [Santander]-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Instituto de Física de Cantabria (IFCA), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Applied Physics and Photonics, and Brussels Photonics Team
Subjects: VCSELs, chaos, Spontaneous emission, SEMICONDUCTOR-LASER, Physics::Optics, 02 engineering and technology, FREQUENCY, DIODE, 7. Clean energy, 01 natural sciences, Semiconductor laser theory, Vertical-cavity surface-emitting laser, law.invention, 010309 optics, nonlinear dynamics, [SPI]Engineering Sciences [physics], 020210 optoelectronics & photonics, Optics, law, Polarization, 0103 physical sciences, [ SPI ] Engineering Sciences [physics], 0202 electrical engineering, electronic engineering, information engineering, [NLIN]Nonlinear Sciences [physics], [PHYS]Physics [physics], Semiconductor lasers, Physics, RESOLVED DYNAMICS, [ PHYS ] Physics [physics], SURFACE-EMITTING LASERS, business.industry, [ NLIN ] Nonlinear Sciences [physics], Single-mode optical fiber, Biasing, locking, Polarization (waves), Laser, Atomic and Molecular Physics, and Optics, Injection locking, Nonlinear system, Diode Lasers, business, subject
Abstract: We report an experimental study of the polarization nonlinear dynamics in a 1550 nm single-mode vertical-cavity surface-emitting laser (VCSEL) subject to parallel optical injection. Experimentally measured stability maps identifying regions of different nonlinear dynamics for various values of bias current are reported. We show that VCSELs with more than a 35 dB polarization mode suppression ratio can have rich nonlinear dynamics in both linear polarizations, including periodic and chaotic behaviors appearing simultaneously in both polarization modes., Ministerio de Economía y Competitividad (MINECO) (TEC2015-65212-C3-1-P); Fonds Wetenschappelijk Onderzoek (FWO); Agence Nationale de la Recherche (ANR) (ANR-12-JS03-005); Prefecture de Region Grand-Est (Chair in Photonics, FEDER [PHOTON, APOLLO], FNADT[APOLLO, PIANO]); AIRBUS-GDI Simulation; Metz Metropole; Conseil Departemental de Moselle; Conseil Regional Grand-Est.
Published: 2017
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3. Injection locking and polarization switching bistability in a 1550 nm VCSEL subject to parallel optical injection

Author: Pablo Pérez, Florian Denis-le Coarer, Marc Sciamanna, Hugo Thienpont, Luis Pesquera, Angel Valle, Ana Quirce, Krassimir Panajotov, Applied Physics and Photonics, Brussels Photonics Team, Laboratoire matériaux organiques à propriétés spécifiques ( LMOPS ), Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces ( LEPMI ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut National Polytechnique de Grenoble ( INPG ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut National Polytechnique de Grenoble ( INPG ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ), Chaire Photonique, Laboratoire Matériaux Optiques, Photonique et Systèmes ( LMOPS ), CentraleSupélec-Université de Lorraine ( UL ) -CentraleSupélec-Université de Lorraine ( UL ), Centro de estudios e investigaciones laborales del Consejo Nacional de Investigaciones Cientificas y Tecnologicas de Argentina ( CEIL-PIETTE DEL CONICET ), Universidad de Buenos Aires [Buenos Aires], Instituto de Fisica de Cantabria ( IFCA ), Universidad de Cantabria [Santander]-Consejo Superior de Investigaciones Científicas [Spain] ( CSIC ), Instituto de Física de Cantabria ( CSIC-UC ), Instituto de Física de Cantabria, CentraleSupélec-Université de Lorraine ( UL ), Department of Applied Physics and Photonics [Brussels] ( TONA ), Vrije Universiteit [Brussel] ( VUB ), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL)-CentraleSupélec-Université de Lorraine (UL), CentraleSupélec-Université de Lorraine (UL), Centro de estudios e investigaciones laborales [Buenos Aires] (CEIL), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET), Instituto de Fisica de Cantabria (IFCA), Universidad de Cantabria [Santander]-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Instituto de Física de Cantabria (IFCA), Department of Applied Physics and Photonics [Brussels] (TONA), and Vrije Universiteit Brussel (VUB)
Subjects: VCSELs, Materials science, Bistability, bistability, Optical bistability, 02 engineering and technology, Laser mode locking, Semiconductor laser theory, Vertical-cavity surface-emitting laser, [SPI]Engineering Sciences [physics], 020210 optoelectronics & photonics, 0202 electrical engineering, electronic engineering, information engineering, [ SPI ] Engineering Sciences [physics], [NLIN]Nonlinear Sciences [physics], Electrical and Electronic Engineering, [PHYS]Physics [physics], Semiconductor lasers, [ PHYS ] Physics [physics], business.industry, Orthogonal polarization spectral imaging, [ NLIN ] Nonlinear Sciences [physics], Optical polarization, injection-locked lasers, Optical coupling, Atomic and Molecular Physics, and Optics, Transverse mode, Injection locking, Optoelectronics, business, Optical attenuators, vertical-cavity surface-emitting lasers
Abstract: We present experimental and theoretical results of bistable polarization switching in a single transverse mode 1550 nm vertical-cavity surface-emitting laser (VCSEL) subject to parallel optical injection. We focus our analysis on the bistability induced by power variation of the master laser found on the recently observed state of simultaneous injection locking of the parallel polarization mode and excitation of the orthogonal polarization mode, IL+PS. Experimental stability maps identifying, in the injected power-frequency detuning plane, where this state is observed, and corresponding bistable regions are reported for several bias currents. We find bistability between the IL+PS state and the single polarization mode injection locked solution. We also find bistability between the IL+PS and different periodic dynamics in the parallel polarization mode. The width of the hysteresis cycle increases when increasing the bias current or when increasing the wavelength of the optical injection beyond the solitary VCSEL wavelength. We theoretically confirm these types of bistability by numerically simulating the spin-flip model and by performing a linear stability analysis for the different stable states. Excellent agreement is found between experimental and theoretical results.
Published: 2017
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4. Synchronization of polarization chaos from a free-running VCSEL

Author: Krassimir Panajotov, Martin Virte, Marc Sciamanna, Applied Physics and Photonics, Faculty of Engineering, Brussels Photonics Team, OPTEL - Equipe Optique et électronique pour les télécoms, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB)-Vrije Universiteit Brussel (VUB), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Vrije Universiteit Brussel (VUB), Department of Applied Physics and Photonics [Brussels] ( TONA ), Vrije Universiteit [Brussel] ( VUB ) -Vrije Universiteit [Brussel] ( VUB ), Laboratoire Matériaux Optiques, Photonique et Systèmes ( LMOPS ), CentraleSupélec-Université de Lorraine ( UL ), and Vrije Universiteit [Brussel] ( VUB )
Subjects: VCSELs, Spontaneous emission, Chaotic, Random number generation, Topology, DIODE, 01 natural sciences, Synchronization, Vertical-cavity surface-emitting laser, law.invention, 010309 optics, Carbon dioxide lasers, [SPI]Engineering Sciences [physics], Optics, law, Robustness (computer science), 0103 physical sciences, [ SPI ] Engineering Sciences [physics], Optical feedback, [NLIN]Nonlinear Sciences [physics], 010306 general physics, Physics, [PHYS]Physics [physics], [ PHYS ] Physics [physics], business.industry, [ NLIN ] Nonlinear Sciences [physics], Communication, Systems, LIGHT-POLARIZATION, dynamics, Polarization (waves), Laser, Atomic and Molecular Physics, and Optics, EMITTING SEMICONDUCTOR-LASERS, Circular polarization, business
Abstract: We theoretically demonstrate the possibility to synchronize polarization chaos generated by a free-running vertical-cavity surface-emitting laser (VCSEL). We highlight two distinct synchronization regimes: 1) a high-quality synchronization regime where all polarization modes and total intensity are synchronized, which shows good robustness against parameter mismatch, and 2) a "slow time-scale" synchronization where the slower part of the dynamics-that is, the random-like hopping between the two scrolls of the chaotic attractor-synchronizes while the faster oscillations remain unsynchronized. (C) 2016 Optical Society of America
Published: 2016
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5. One way synchronization of polarization chaos from a solitary Vertical-Cavity Surface-Emitting Laser

Author: Hugo Thienpont, Martin Virte, Krassimir Panajotov, Marc Sciamanna, Vrije Universiteit [Brussel] ( VUB ), Laboratoire Matériaux Optiques, Photonique et Systèmes ( LMOPS ), CentraleSupélec-Université de Lorraine ( UL ), Department of Applied Physics and Photonics [Brussels] ( TONA ), Vrije Universiteit Brussel (VUB), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Department of Applied Physics and Photonics [Brussels] (TONA), Applied Physics and Photonics, Faculty of Engineering, and Brussels Photonics Team
Subjects: Chaotic, Physics::Optics, Laser damage threshold, 01 natural sciences, Optical simulations, Synchronization, Semiconductor laser theory, law.invention, Vertical-cavity surface-emitting laser, 010309 optics, [SPI]Engineering Sciences [physics], Atomic force microscopy, Optics, law, Polarization, 0103 physical sciences, Vertical cavity surface emitting lasers, [ SPI ] Engineering Sciences [physics], [NLIN]Nonlinear Sciences [physics], 010306 general physics, [PHYS]Physics [physics], Physics, Semiconductor lasers, [ PHYS ] Physics [physics], business.industry, [ NLIN ] Nonlinear Sciences [physics], LIGHT-POLARIZATION, Polarization (waves), Laser, SEMICONDUCTOR-LASERS, Unidirectional coupling, Nonlinear system, Chaos, business
Abstract: International audience; We investigate theoretically the synchronization properties of the polarization chaos dynamics generated by a free-running vertical-cavity surface-emitting laser (VCSEL). Here, we focus on a one-way master-slave configuration - or unidirectional coupling - with two chaotic VCSELs. The spin-flip model is used to model the two devices and derived to account for the coupling between them. We demonstrate that the chaotic dynamics generated by the two lasers can indeed synchronize in the proposed configuration. The synchronization appears to be of high quality as we obtain a high-level of similarity between the emission characteristics of the master and slave laser dynamics.
Published: 2016
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6. Range-dependent effects of optical feedback on multimode two-color quantum dot lasers

Author: Martin Virte, Robert Pawlus, Wolfgang Elsäßer, Marc Sciamanna, Krassimir Panajotov, Stefan Breuer, Applied Physics and Photonics, Faculty of Engineering, Brussels Photonics Team, Laboratoire Matériaux Optiques, Photonique et Systèmes ( LMOPS ), CentraleSupélec-Université de Lorraine ( UL ), Technische Universität Darmstadt ( TU Darmstadt ), Department of Applied Physics and Photonics [Brussels] ( TONA ), Vrije Universiteit [Brussel] ( VUB ), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Technische Universität Darmstadt (TU Darmstadt), Department of Applied Physics and Photonics [Brussels] (TONA), and Vrije Universiteit Brussel (VUB)
Subjects: Physics::Optics, Electrons, EXCITED-STATE, 02 engineering and technology, 01 natural sciences, Semiconductor laser theory, law.invention, 010309 optics, [SPI]Engineering Sciences [physics], 020210 optoelectronics & photonics, Optics, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, [ SPI ] Engineering Sciences [physics], [NLIN]Nonlinear Sciences [physics], Quantum well, Physics, [PHYS]Physics [physics], Semiconductor lasers, Distributed feedback laser, Multi-mode optical fiber, [ PHYS ] Physics [physics], business.industry, [ NLIN ] Nonlinear Sciences [physics], Laser, Optical microcavity, Applied physics, Beam splitters, Quantum dot laser, Switching, Optoelectronics, business, Quantum dot lasers, Tunable laser
Abstract: International audience; We investigate the behaviour of a multimode two-color quantum dot laser subject to optical feedback. In particular, we focus on the effects of a variation of the external cavity length at the micrometer scale on the laser emission characteristics and especially on its optical spectrum. For each mode, we observe oscillations of the output power with different spectral amplitudes. No clustering or mode grouping effect is observed. Theoretically, we demonstrate a good agreement with a multimode two-color quantum dot laser model.
Published: 2016
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7. Energy exchange between modes in a multimode two-color quantum dot laser with optical feedback

Author: Marc Sciamanna, Martin Virte, Stefan Breuer, Robert Pawlus, Krassimir Panajotov, Laboratoire matériaux organiques à propriétés spécifiques ( LMOPS ), Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces ( LEPMI ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut National Polytechnique de Grenoble ( INPG ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut National Polytechnique de Grenoble ( INPG ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ), Department of Applied Physics and Photonics [Brussels] ( TONA ), Vrije Universiteit [Brussel] ( VUB ), Applied Physics and Photonics, Faculty of Engineering, Brussels Photonics Team, Department of Applied Physics and Photonics [Brussels] (TONA), and Vrije Universiteit Brussel (VUB)
Subjects: Phase (waves), SEMICONDUCTOR-LASER, 02 engineering and technology, 01 natural sciences, 010309 optics, state, Emission, [SPI]Engineering Sciences [physics], generation, 0103 physical sciences, [ SPI ] Engineering Sciences [physics], Optical feedback, [NLIN]Nonlinear Sciences [physics], Phase shift, Optical sennsing, Energy exchange, Physics, [PHYS]Physics [physics], Distributed feedback laser, Multi-mode optical fiber, [ PHYS ] Physics [physics], [ NLIN ] Nonlinear Sciences [physics], 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, 3. Good health, Quantum dot laser, Excited state, Terahertz generation, Atomic physics, 0210 nano-technology, Ground state, Quantum dot lasers, Energy (signal processing)
Abstract: We investigate experimentally and theoretically the multi-mode dynamics of a two-color quantum dot laser subject to time-delayed optical feedback. We unveil energy exchanges between the longitudinal modes of the excited state triggered by variations of the feedback phase, and observe that the modal competition between longitudinal modes appears independently within the ground state and excited state emission. These features are accurately reproduced with a quantum dot laser model extended to take into account multiple modes for both ground and excited states. Finally, we discuss the significant impact of such behavior on feedback-based control of two-color quantum dot lasers. (C) 2016 Optical Society of America
Published: 2016
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8. Recurrent state-switching of a two-state quantum dot laser by optical feedback

Author: Krassimir Panajotov, Marc Sciamanna, Stefan Breuer, Martin Virte, Applied Physics and Photonics, Faculty of Engineering, Brussels Photonics Team, Laboratoire Matériaux Optiques, Photonique et Systèmes ( LMOPS ), CentraleSupélec-Université de Lorraine ( UL ), Technische Universität Darmstadt ( TU Darmstadt ), Department of Applied Physics and Photonics [Brussels] ( TONA ), Vrije Universiteit [Brussel] ( VUB ), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Technische Universität Darmstadt (TU Darmstadt), Department of Applied Physics and Photonics [Brussels] (TONA), and Vrije Universiteit Brussel (VUB)
Subjects: Physics::Optics, 02 engineering and technology, gain, Optical switch, law.invention, Semiconductor laser theory, [SPI]Engineering Sciences [physics], 020210 optoelectronics & photonics, Optics, law, 0202 electrical engineering, electronic engineering, information engineering, [ SPI ] Engineering Sciences [physics], [NLIN]Nonlinear Sciences [physics], Physics, Optical amplifier, [PHYS]Physics [physics], Semiconductor lasers, Distributed feedback laser, [ PHYS ] Physics [physics], business.industry, [ NLIN ] Nonlinear Sciences [physics], Electroluminescent displays, Laser optics, Feedback control, Laser, Mirrors, Quantum dot laser, Excited state, Switching, Semiconductor optical gain, business, Quantum dot lasers
Abstract: International audience; In this contribution, we experimentally report recurrent switching between ground and excited state emission in a quantum dot laser controlled by optical feedback. We demonstrate that changing the phase of the optical feedback can efficiently induce switching between the two emission processes of the laser. Experimentally, by using an external mirror placed on a piezo-actuator, we were able to achieve incomplete switching between ground and excited state emission, i.e. without complete extinction of the modes. The switching takes place for variations of the external cavity length at the wavelength scale, i.e. around 1.2 um. Theoretically, we successfully link this switching behaviour with the evolution of the modal gain difference between the two modes induced by the variations of the optical feedback phase.
Published: 2016
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9. Nonlinear dynamics of a laser diode with an injection of an optical frequency comb

Author: Yaya Doumbia, Delphine Wolfersberger, Tushar Malica, Marc Sciamanna, Krassimir Panajotov, Chaire Photonique, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL)-CentraleSupélec-Université de Lorraine (UL), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Brussels Photonics Team, and Applied Physics and Photonics
Subjects: Materials science, Physics::Optics, 02 engineering and technology, Parameter space, 01 natural sciences, law.invention, 010309 optics, Frequency comb, SEMICONDUCTOR-LASER, LOCKING, CHAOS, GENERATION, Optics, law, 0103 physical sciences, Physics::Atomic Physics, [PHYS]Physics [physics], Laser diode, laser diode, business.industry, Nonlinear Laser Dynamics, 021001 nanoscience & nanotechnology, Laser, Atomic and Molecular Physics, and Optics, Injection locking, Nonlinear system, Semiconductor, Amplitude, 0210 nano-technology, business, Optical Frequency Combs
Abstract: International audience; We experimentally and theoretically demonstrate the variety of the nonlinear dynamics exhibited by a single frequency semiconductor laser subjected to optical injection from a frequency comb. The injection parameters (the detuning and the injection strength) and the comb properties (comb spacing and the amplitude of the injected comb lines) are varied to unveil several dynamics such as injection locking, wave-mixing, chaotic dynamics, and unlocked time-periodic dynamics corresponding to new comb solutions. The asymmetry of the injected comb is shown to modify the size of the injection locking region in the parameter space, as well as the common properties between the new comb solutions observed and the injected comb.
Published: 2020
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10. Frequency comb customization by controlling the optical injection dynamics

Author: Tushar Malica, Yaya Doumbia, Krassimir Panajotov, Delphine Wolfersberger, Marc Sciamanna, Chaire Photonique, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL)-CentraleSupélec-Université de Lorraine (UL), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Sciamanna, Marc, Michalzik, Rainer, Panajotov, Krassimir, Hofling, Sven, Brussels Photonics Team, Applied Physics and Photonics, and Doumbia, Yaya
Subjects: Materials science, animal structures, Physics::Optics, SURFACE-EMITTING LASERS, SEMICONDUCTOR-LASER, NONLINEAR DYNAMICS, SUBJECT, STABILITY, LOCKING, 02 engineering and technology, 01 natural sciences, [PHYS] Physics [physics], law.invention, 010309 optics, Frequency comb, Fundamental difference, law, 0103 physical sciences, Physics::Atomic Physics, Times periodic dynamics, Optical injection locking, [PHYS]Physics [physics], choas, business.industry, Dynamics (mechanics), fungi, Single-mode optical fiber, 021001 nanoscience & nanotechnology, Laser, Nonlinear system, Semiconductor, Optoelectronics, 0210 nano-technology, business
Abstract: International audience; This work reports on numerical analysis of the nonlinear dynamics of a semiconductor laser subject to an optical injection with a frequency comb. We identified the fundamental difference between the single mode injection and frequency comb injection. By varying the injection parameters (detuning and injection ratio), the results show that the slave laser is able to reproduce the injected frequency comb (new comb) in different parameters regions. The appearance of the new comb depends on the number of injected comb lines for fixed comb properties.
Published: 2020

11. Optical injection dynamics of frequency combs

Author: Tushar Malica, Marc Sciamanna, Delphine Wolfersberger, Krassimir Panajotov, Yaya Doumbia, Chaire Photonique, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL)-CentraleSupélec-Université de Lorraine (UL), Department of Applied Physics and Photonics [Brussels] (TONA), and Vrije Universiteit Brussel (VUB)
Subjects: Materials science, Physics::Optics, 02 engineering and technology, Sharpening, 01 natural sciences, law.invention, Semiconductor laser theory, 010309 optics, Frequency comb, 020210 optoelectronics & photonics, Optics, law, Optical Injection, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Physics::Atomic Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Semiconductor Laser, business.industry, Laser, Atomic and Molecular Physics, and Optics, Pulse (physics), Injection locking, Semiconductor, Quantum dot laser, business, Frequency Combs
Abstract: International audience; We analyze the nonlinear dynamics of a semiconductor laser with optical injection from a frequency comb. When varying both the injection parameters (detuning and injection ratio) and the comb properties (number of comb lines and comb spacing), we identify and select several dynamics, including (1) injection locking with selective amplification of the comb line that shows the smallest detuning from the injected laser, (2) unlocked time-periodic dynamics that correspond to a new frequency comb with a broadened optical spectrum, thereby sharpening the pulse generated at the injected laser output, and (3) unlocked chaotic dynamics.
Published: 2020
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12. Technological bricks development for the vertical integration of a Modulator onto a VCSEL for high-speed communications

Author: Ludovic Marigo-Lombart, Alexandre Arnoult, Stephane Calvez, Christophe Viallon, Olivier Gauthier-Lafaye, Antoine Monmayrant, Aurélie Lecestre, Laurent Mazenq, Jean Baptiste Doucet, Alexandre Rumeau, Thienpont, H., Panajotov, K., Guilhem Almuneau, Équipe Photonique (LAAS-PHOTO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications (LAAS-MOST), Service Instrumentation Conception Caractérisation (LAAS-I2C), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), and Université de Toulouse (UT)
Subjects: [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: National audience; The vertical integration of a Modulator onto a mesa-structure VCSEL would allows to go beyond the physical limit of the carrier dynamics for direct modulation. However, this double mesa structure monolithically integrated requires three electrodes and a high frequency injection design optimization. This paper relates the different technological improvements to achieve the static and high frequency operation of such a device.
Published: 2019

13. Electro-Absorption Modulator Vertically Integrated on a VCSEL: Microstrip-Based High-Speed Electrical Injection on Top of a BCB Layer

Author: Aurélie Lecestre, Hugo Thienpont, Christophe Viallon, Ayad Ghannam, Guilhem Almuneau, Ludovic Marigo-Lombart, Alexandre Rumeau, Alexandre Arnoult, Krassimir Panajotov, Laurent Mazenq, Équipe Photonique (LAAS-PHOTO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications (LAAS-MOST), Service Instrumentation Conception Caractérisation (LAAS-I2C), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), 3DiS Technologies, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Applied Physics and Photonics, and Brussels Photonics Team
Subjects: Materials science, Electro-absorption modulator, 02 engineering and technology, VCSEL, Microstrip, Vertical-cavity surface-emitting laser, [SPI.MAT]Engineering Sciences [physics]/Materials, chemistry.chemical_compound, 020210 optoelectronics & photonics, Benzocyclobutene, High-speed modulation, high-speed modulation, 0202 electrical engineering, electronic engineering, information engineering, electro-absorption modulator, Output impedance, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, BCB, business.industry, Coplanar waveguide, Atomic and Molecular Physics, and Optics, Electrical contacts, chemistry, Modulation, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Optoelectronics, business, BENZOCYCLOBUTENE, FABRICATION, PASSIVATION, FILMS
Abstract: International audience; Vertical-cavity surface-emitting lasers with vertically integrated electro-absorption modulators (EAM-VCSELs) potentially can reach higher modulation bandwidths than directly current-modulated VCSELs. The aforementioned device modulation capabilities are, however, currently restricted by their electrical contact parasitics. It, thus, becomes critical to optimize their access line to improve performance. In this paper, we numerically and experimentally demonstrate that a microstrip (MS) access line using a planarized benzocyclobutene (BCB) layer exhibits improved high-frequency characteristics compared to the coplanar waveguide (CPW) access line used to-date, since it reduces the losses induced by the doped substrates. We also use this opportunity to introduce an innovative technique for BCB layer planarization, which is not only compatible with the EAM-VCSEL double-mesa structure, but is also independent of the device pitch. The resulting BCB layer dielectric permittivity and losses are measured up to 100 GHz, and a side-by-side comparison of the electrical response of three-electrodes MS and CPW access lines is subsequently carried out. Finally, using the measured pad and access line RF responses and the EAM modulation characteristics, the devices with MS access are shown to be no longer limited by their electrode parasitics, but by the modulator internal impedance.
Published: 2019
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14. 29GHz-bandwidth monolithically integrated EAM-VCSEL

Author: Alexandre Rumeau, Ludovic Marigo-Lombart, Olivier Gauthier-Lafaye, Christophe Viallon, Guilhem Almuneau, Stephane Calvez, Antoine Monmayrant, Alexandre Arnoult, Hugo Thienpont, Krassimir Panajotov, Équipe Photonique (LAAS-PHOTO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications (LAAS-MOST), Service Instrumentation Conception Caractérisation (LAAS-I2C), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Almuneau, Guilhem, Technology Transfer & Interface, Applied Physics and Photonics, Brussels Photonics Team, and Vrije Universiteit Brussel [Bruxelles] (VUB)
Subjects: Physics, Contact pad, [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, business.industry, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Bandwidth (signal processing), [SPI.MAT] Engineering Sciences [physics]/Materials, Laser, Vertical-cavity surface-emitting laser, law.invention, [SPI.MAT]Engineering Sciences [physics]/Materials, Modulation, law, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Optoelectronics, Access line, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Carrier dynamics, business, Voltage
Abstract: International audience; The increase in modulation bandwidth of a vertical-cavity surface-emitting laser (VCSEL) can be achieved through the vertical integration of a modulator onto the laser. This approach has already been proposed and demonstrated to be competitive [1-3]. In this specific case, a double mesa structure with three contacts is needed to apply a high-frequency voltage signal to the modulator section and inject a CW current into the underlying VCSEL section. The middle contact serves as a shared ground. Indeed, splitting the emitting and the modulating parts circumvents the carrier dynamics limitation of the modulation bandwidth encountered in direct current-modulated VCSELs. However, the parasitic capacitances of the access line and contact pad play a significant role in the high-frequency limit of such a device. In this paper, we present the design, fabrication and modulation characteristics of an electro-absorption modulator (EAM) vertically-integrated onto an 850-nm VCSEL that is compatible with high-frequency operation. The two optical cavities are such that their mutual optical coupling is small to improve the modulation properties at high frequencies. This EAM-VCSEL device has been successfully fabricated by molecular beam epitaxy, followed by an original technological process [4]. In particular, planarized BCB layers and microstrip access lines have been implemented to optimize the high-frequency signal injection. Thanks to the optimized wavelength detuning between the cavities resonances of the EAM and the VCSEL and respectively to the quantum well absorption tail of the modulator, the EAM modulator exhibits a modulation depth of more than 40% within a 4V span. This vertically integrated EAM-VCSEL approach enables also to minimize the wavelength chirp during the modulation, which in our case is lower than 80 pm. Finally, 3-dB frequency bandwidths up to 29 GHz were measured on both stand-alone vertical EAM devices and vertically-integrated EAM-VCSELs. (a) (b)Fig. 1 (a) Schematics of the EAM-VCSEL structure under study with planarized BCB and (b) high-frequency modulation response of the EAM-VCSEL device with different DC bias voltages applied to the EAM.
Published: 2019
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15. Photo-crosslinkable recombinant collagen mimics for tissue engineering applications

Author: Marica Markovic, Liesbeth Tytgat, Maxime Vagenende, Hugo Thienpont, Taimoor H. Qazi, Christian Rolando, Sandra Van Vlierberghe, Heidi Ottevaere, Peter Dubruel, José C. Martins, Aleksandr Ovsianikov, Fabrice Bray, Miniaturisation pour la Synthèse, l’Analyse et la Protéomique - USR 3290 (MSAP), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Universidade Federal do Tocantins (UFT), Universidade Federal do Tocantins, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Faculty of Sciences, Polymer Chemistry and Biomaterials Research Group, Universiteit Gent = Ghent University [Belgium] (UGENT), Applied Physics and Photonics, Faculty of Engineering, Brussels Photonics Team, Miniaturisation pour la Synthèse, l’Analyse et la Protéomique - UAR 3290 (MSAP), Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Universiteit Gent = Ghent University (UGENT)
Subjects: food.ingredient, Biocompatibility, IN-VITRO, MECHANICAL-PROPERTIES, GELATIN METHACRYLOYL, HYDROGELS. PART, BEHAVIOR, Biomedical Engineering, Adipose tissue, Biocompatible Materials, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Gelatin, chemistry.chemical_compound, food, Tissue engineering, medicine, Methacrylamide, Humans, [CHIM]Chemical Sciences, General Materials Science, ComputingMilieux_MISCELLANEOUS, Tissue Engineering, Regeneration (biology), Biology and Life Sciences, Biomaterial, General Chemistry, General Medicine, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Chemistry, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Collagen, Swelling, medicine.symptom, 0210 nano-technology, Biomedical engineering
Abstract: Gelatin is frequently used in various biomedical applications. However, gelatin is generally extracted from an animal source, which can result in issues with reproducibility as well as pathogen transmittance. Therefore, we have investigated the potential of a recombinant peptide based on collagen I (RCPhC1) for tissue engineering applications and more specifically for adipose tissue regeneration. In the current paper, RCPhC1 was functionalized with photo-crosslinkable methacrylamide moieties to enable subsequent UV-induced crosslinking in the presence of a photo-initiator. The resulting biomaterial (RCPhC1-MA) was characterized by evaluating the crosslinking behaviour, the mechanical properties, the gel fraction, the swelling properties and the biocompatibility. The obtained results were compared with the data obtained for methacrylamide-modified gelatin (Gel-MA). The results indicated that the properties of RCPhC1-MA networks are comparable to those of animal-derived Gel-MA. RCPhC1-MA is thus an attractive synthetic alternative for animal-derived Gel-MA and is envisioned to be applicable for a wide range of tissue engineering purposes.
Published: 2019
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16. High frequency operation of an integrated electro-absorption modulator onto a VCSEL

Author: Marigo-Lombart, Ludovic, Rumeau, Alexandre, Viallon, Christophe, Arnoult, Alexandre, CALVEZ, Stéphane, Monmayrant, Antoine, Gauthier-Lafaye, Olivier, Rosales, R, Lott, J, Thienpont, H, Panajotov, K, Almuneau, Guilhem, Équipe Photonique (LAAS-PHOTO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Service Instrumentation Conception Caractérisation (LAAS-I2C), Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications (LAAS-MOST), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Technische Universität Berlin (TU), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), and Technical University of Berlin / Technische Universität Berlin (TU)
Subjects: [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: International audience; We present in this paper the vertical integration of an electro-absorption modulator (EAM) onto a VCSEL. We discuss the design, fabrication, and measured characteristics of the combined VCSEL and EAM. We previously demonstrated a standalone EAM with an optical bandwidth around 30 GHz. In this paper we present for the first time an optical bandwidth of 30 GHz for an electro-absorption modulator integrated onto a VCSEL. This device exhibits single-mode operation and a very low chirp, below 0.1 nm, even with a modulation depth of 70 % which makes this device very competitive for high-speed communications in data centers.
Published: 2019
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17. Precise characterisation of isolated molecules: general discussion

Author: Ingo Fischer, Ad van der Avoird, Stephen R. Leone, David M. Benoit, Graham A. Worth, Roland Wester, F. A. Gianturco, Jens Petersen, Anne Zehnacker-Rentien, Anne B. McCoy, Petr Slavíček, Paul L. Houston, Matthieu Besemer, Thierry Stoecklin, Joel M. Bowman, David C. Clary, Robert J. Donovan, Roberto Linguerri, Stephen E. Bradforth, Majdi Hochlaf, Uwe Manthe, Krzysztof Szalewicz, Xiao Shan, Peter J. Knowles, Jeremy O. Richardson, Zlatko Bačić, Centre d'Enseignement et de Recherche en Mathématiques et Calcul Scientifique (CERMICS), École des Ponts ParisTech (ENPC), Emory University [Atlanta, GA], Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Laboratoire de Modélisation et Simulation Multi Echelle (MSME), Université Paris-Est Marne-la-Vallée (UPEM)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), University of Nottingham, UK (UON), School of Chemistry, University of Birmingham [Birmingham], Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Theoretische Chemie, Universität Bielefeld, Germany, Universität Bielefeld = Bielefeld University, University of Chemistry and Technology Prague (UCT Prague), Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), U.Delaware, University of Delaware [Newark], Institute for Molecules and Materials, Radboud university [Nijmegen], Universität Innsbruck [Innsbruck], Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), SYSIPHE, Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Vrije Universiteit [Brussels] (VUB), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université Paris-Est Marne-la-Vallée (UPEM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Centre National de la Recherche Scientifique (CNRS), and Radboud University [Nijmegen]
Subjects: Chemistry, business.industry, MEDLINE, 02 engineering and technology, Computational biology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Text mining, [CHIM]Chemical Sciences, Physical and Theoretical Chemistry, 0210 nano-technology, business, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2018
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18. Molecules in confinement in liquid solvents: general discussion

Author: Jeremy O. Richardson, Martin Dracinsky, Petr Slavíček, Adam Kirrander, Majdi Hochlaf, Krzysztof Szalewicz, Loren Ban, Jens Petersen, Ingo Fischer, Robert W. Góra, Anne B. McCoy, Joel M. Bowman, Gilberte Chambaud, Stephen E. Bradforth, Mikołaj J. Janicki, Anne Zehnacker-Rentien, Emory University [Atlanta, GA], Laboratoire de Modélisation et Simulation Multi Echelle (MSME), Université Paris-Est Marne-la-Vallée (UPEM)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), U.Delaware, University of Delaware [Newark], Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), SYSIPHE, Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université Paris-Est Marne-la-Vallée (UPEM), and Vrije Universiteit [Brussels] (VUB)
Subjects: Materials science, 010504 meteorology & atmospheric sciences, Chemical physics, Molecule, [CHIM]Chemical Sciences, 010501 environmental sciences, Physical and Theoretical Chemistry, 01 natural sciences, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences
Abstract: Faraday Discussions, 212, ISSN:1359-6640, ISSN:1364-5498
Published: 2018
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19. Quantum dynamics of isolated molecules: general discussion

Author: Majdi Hochlaf, Ingo Fischer, Joel M. Bowman, Uwe Manthe, Robert J. Donovan, Adam Kirrander, Thierry Stoecklin, Jens Petersen, Dmitri Babikov, David C. Clary, Stephen R. Leone, David M. Benoit, Roland Wester, Anne B. McCoy, Jeremy O. Richardson, Petr Slavíček, F. A. Gianturco, Timothy A. H. Burd, Susmita Kar, Ad van der Avoird, Graham A. Worth, Krzysztof Szalewicz, Thomas Malcomson, Anne Zehnacker-Rentien, Marquette University, Centre d'Enseignement et de Recherche en Mathématiques et Calcul Scientifique (CERMICS), École des Ponts ParisTech (ENPC), Emory University [Atlanta, GA], Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit [Brussels] (VUB), Laboratoire de Modélisation et Simulation Multi Echelle (MSME), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université Paris-Est Marne-la-Vallée (UPEM), Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Theoretische Chemie, Universität Bielefeld, Germany, Universität Bielefeld = Bielefeld University, University of Chemistry and Technology Prague (UCT Prague), Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Centre National de la Recherche Scientifique (CNRS), U.Delaware, University of Delaware [Newark], Institute for Molecules and Materials, Radboud university [Nijmegen], Universität Innsbruck [Innsbruck], School of Chemistry, University of Birmingham [Birmingham], Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), SYSIPHE, Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Marquette University [Milwaukee], Vrije Universiteit Brussel (VUB), Université Paris-Est Marne-la-Vallée (UPEM)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Radboud University [Nijmegen]
Subjects: Physics, Chemical physics, Quantum dynamics, Molecule, [CHIM]Chemical Sciences, 02 engineering and technology, Physical and Theoretical Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 0210 nano-technology, 01 natural sciences, ComputingMilieux_MISCELLANEOUS, 0104 chemical sciences
Abstract: International audience
Published: 2018
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20. Molecules in confinement in clusters, quantum solvents and matrices: general discussion

Author: Ingo Fischer, Martin Dracinsky, Anne Zehnacker-Rentien, Majdi Hochlaf, Claudine Crépin, Zlatko Bačić, Ad van der Avoird, David M. Benoit, Halima Mouhib, Irena Kratochvílová, Jun Miyazaki, F. A. Gianturco, David C. Clary, Malgorzata Biczysko, Timothy A. H. Burd, Joel M. Bowman, Jeremy O. Richardson, Peter M. Felker, Thierry Stoecklin, Chun Mei Liu, Karel Kouril, Krzysztof Szalewicz, Petr Slavíček, Anne B. McCoy, Gilberte Chambaud, Stephen E. Bradforth, Centre d'Enseignement et de Recherche en Mathématiques et Calcul Scientifique (CERMICS), École des Ponts ParisTech (ENPC), Emory University [Atlanta, GA], Laboratoire de Modélisation et Simulation Multi Echelle (MSME), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université Paris-Est Marne-la-Vallée (UPEM), Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), SYSIPHE, Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Computer Science Department [UCLA] (UCLA-CS), University of California [Los Angeles] (UCLA), University of California-University of California, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit [Brussels] (VUB), Institute of Physics, Academy of Sciences of the Czech Republic, Key Laboratory of Modern Metallurgy and Material Processing, University of Shanghai [Shanghai], Institute of Physical Chemistry [Aachen] (IPC), Rheinisch-Westfälische Technische Hochschule Aachen (RWTH), University of Chemistry and Technology Prague (UCT Prague), Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Centre National de la Recherche Scientifique (CNRS), U.Delaware, University of Delaware [Newark], Institute for Molecules and Materials, Radboud university [Nijmegen], Université Paris-Est Marne-la-Vallée (UPEM)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), University of California (UC)-University of California (UC), Vrije Universiteit Brussel (VUB), Czech Academy of Sciences [Prague] (CAS), Rheinisch-Westfälische Technische Hochschule Aachen University (RWTH), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Radboud University [Nijmegen]
Subjects: Physics, Chemical physics, Molecule, [CHIM]Chemical Sciences, 02 engineering and technology, Physical and Theoretical Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 0210 nano-technology, 01 natural sciences, Quantum, ComputingMilieux_MISCELLANEOUS, 0104 chemical sciences
Abstract: Faraday Discussions, 212, ISSN:1359-6640, ISSN:1364-5498
Published: 2018
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21. High frequency characterization of a vertical electro-absorption modulator for data communications

Author: Ludovic Marigo-Lombart, Christophe Viallon, Guilhem Almuneau, Olivier Gauthier-Lafaye, Alexandre Rumeau, Krassimir Panajotov, Antoine Monmayrant, Hugo Thienpont, Équipe Photonique (LAAS-PHOTO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications (LAAS-MOST), Service Instrumentation Conception Caractérisation (LAAS-I2C), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), IEEE, Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Faculty of Engineering, Applied Physics and Photonics, and Brussels Photonics Team
Subjects: Signal processing, Materials science, Computer Networks and Communications, 02 engineering and technology, VCSEL, 01 natural sciences, Vertical integration, Vertical-cavity surface-emitting laser, law.invention, [SPI.MAT]Engineering Sciences [physics]/Materials, law, 0103 physical sciences, Electro-absorption modulator, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Instrumentation, ComputingMilieux_MISCELLANEOUS, 010302 applied physics, business.industry, modulator, electro-absorption, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Characterization (materials science), Photodiode, high-frequency, Modulation, Optical fiber coupling, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Optoelectronics, Radio frequency, 0210 nano-technology, business
Abstract: This paper describes the high-frequency characterizations of a vertical electro-absorption modulator (EAM) to ensure its monolithic integration onto a VCSEL for data communications. Splitting the emitting and the modulating parts is an attractive approach compared to directly current-modulated VCSEL since it releases the intrinsic limitations due to carriers dynamics that occurs in such VCSEL device. It is, in this aim, utmost to thoroughly characterize and understand the properties and performances of the vertically integrated EAM under high frequency operation, as it will be decisive for the application of EAM-VCSEL to very high data-rate communications. EAM measurements, presented up to 40 GHz, require a precise control of the optical fiber coupling and a precise evaluation of the injection losses over the full frequency range.
Published: 2018

22. Optimisation et Caractérisation hyper-frequence d’un modulateur en vue de son integration verticale sur un VCSEL

Author: Marigo-Lombart, Ludovic, Calvez, Stéphane, Gauthier-Lafaye, Olivier, Monmayrant, Antoine, Arnoult, Alexandre, Rumeau, Alexandre, Viallon, Christophe, Thienpont, Hugo, Panajotov, Krassimir, Almuneau, Guilhem, Équipe Photonique (LAAS-PHOTO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Service Instrumentation Conception Caractérisation (LAAS-I2C), Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications (LAAS-MOST), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), and Université de Toulouse (UT)
Subjects: [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: National audience
Published: 2018

23. Integration of Electro-Absorption Modulator in a Vertical-Cavity Surface-Emitting Laser

Author: Guilhem Almuneau, Stephane Calvez, Christophe Viallon, Hugo Thienpont, Ludovic Marigo-Lombart, Alexandre Rumeau, Alexandre Arnoult, Krassimir Panajotov, Équipe Photonique (LAAS-PHOTO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Service Instrumentation Conception Caractérisation (LAAS-I2C), Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications (LAAS-MOST), SPIE, Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), and Université Fédérale Toulouse Midi-Pyrénées
Subjects: Engineering, business.industry, Quantum-confined Stark effect, 02 engineering and technology, Laser, 01 natural sciences, 7. Clean energy, Microstrip, law.invention, Vertical-cavity surface-emitting laser, 010309 optics, Amplitude modulation, 020210 optoelectronics & photonics, Parasitic capacitance, law, Modulation, 0103 physical sciences, Electro-absorption modulator, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Optoelectronics, business
Abstract: International audience; VCSELs became dominant laser sources in many short optical link applications such as datacenter, active cables, etc. Actual standards and commercialized VCSEL are providing 25 Gb/s data rates, but new solutions are expected to settle the next device generation enabling 100 Gb/s. Directly modulated VCSEL have been extensively studied and improved to reach bandwidths in the range of 26-32 GHz [Chalmers, TU Berlin], however at the price of increased applied current and thus reduced device lifetime. Furthermore, the relaxation oscillation limit still subsists with this solution. Thus, splitting the emission and the modulation functions as done with DFB lasers is a very promising alternative [TI-Tech, TU Berlin]. Here, we study the vertical integration of an Electro-Absorption Modulator (EAM) within a VCSEL, where the output light of the VCSEL is modulated through the EAM section. In our original design, we finely optimized the EAM design to maximize the modulation depth by implementing perturbative Quantum Confined Stark Effect (QCSE) calculations, while designing the vertical integration of the EAM without penalty on the VCSEL static performances. We will present the different fabricated vertical structures, as well as the experimental electrical and optical static measurements for those configurations demonstrating a very good agreement with the reflectivity and absorption simulations obtained for both the VCSEL and the EAM-VCSEL structures. Finally, to reach very high frequency modulation we studied the BCB electrical properties up to 110 GHz and investigated coplanar and microstrip lines access to decrease both the parasitic capacitance and the influence of the substrate. 100 words: In this presentation, we describe the operation of Multiple-Quantum-Wells Asymmetric Fabry-Perot modulator, vertically integrated into a VCSEL structure for high-speed modulation. First we optimize the Electro-Absorptive Modulator (EAM) and the EAM-VCSEL structures by utilizing a perturbative quantum-confined Stark-effect and transfer matrix calculations. Then we present experimental reflectivity, LIV curves and photocurrent measurements and demonstrate very good agreement with our modelling results. High frequency measurements of BCB electrical response up to 110 GHz are carried out to estimate the parasitic effects due to the pad configuration and the impact of the substrate.
Published: 2018
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24. Vertical integration of an electro-absorption modulator within a VCSEL device

Author: Guilhem Almuneau, Aurélie Lecestre, Ludovic Marigo-Lombart, Benjamin Reig, Alexandre Arnoult, Alexandre Rumeau, Stephane Calvez, Christophe Viallon, Krassimir Panajotov, Hugo Thienpont, Applied Physics and Photonics, Brussels Photonics Team, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications (LAAS-MOST), Équipe Photonique (LAAS-PHOTO), Service Instrumentation Conception Caractérisation (LAAS-I2C), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), and Université Fédérale Toulouse Midi-Pyrénées
Subjects: Fabrication, Computer science, Computer Networks and Communications, 02 engineering and technology, Vertical-cavity surface-emitting laser, law.invention, 020210 optoelectronics & photonics, law, Electro-absorption modulator, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, electro-absorption modulator, self-aligned technological processing, Electrical and Electronic Engineering, business.industry, Bandwidth (signal processing), BCB planarization, Laser, high-frequency modulation, Electronic, Optical and Magnetic Materials, vertical cavity lasers, Modulation, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Optoelectronics, Photonics, business, Microwave
Abstract: International audience; The huge increase of datacom traffic requires laser sources of ever-widening modulation bandwidth. Vertical-Cavity Surface-Emitting Lasers (VCSEL) are strategically relevant given that their wide use for short communication links such as in datacenters and are, in light of recent developments, good candidates to address such demands. We propose to increase the modulation bandwidth by vertically integrating a continuous-wave VCSEL with a high-speed electroabsorption modulator (EAM-VCSEL). We will present our studies on the electrical and optical designs, on the development of optimized fabrication steps and on the microwave characterizations leading to the realization of integrated EAM-VCSEL devices.
Published: 2017
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25. Coexistence of cavity solitons with different polarization states and different power peaks in all-fiber resonators

Author: Lionel Weicker, Mustapha Tlidi, Krassimir Panajotov, Etienne Averlant, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Brussels Photonics Team, Applied Physics and Photonics, and Faculty of Engineering
Subjects: Physics, Polarization rotator, Birefringence, business.industry, Linear polarization, Cross-phase modulation, Nonlinear optics, Physics::Optics, Polarization (waves), Bifurcation diagram, 01 natural sciences, Atomic and Molecular Physics, and Optics, 010309 optics, Optics, Electric field, 0103 physical sciences, [NLIN]Nonlinear Sciences [physics], 010306 general physics, business, Nonlinear Sciences::Pattern Formation and Solitons, ComputingMilieux_MISCELLANEOUS
Abstract: We theoretically investigate a weakly birefringent all-fiber cavity subject to linearly polarized optical injection. We describe the propagation of light inside the cavity using, for each linear polarization component of the electric field, the Lugiato-Lefever model. These two components are coupled by cross-phase modulation. We show that, for a wide range of parameters, there is a coexistence between a homogeneous steady state and two different types of temporal vector cavity solitons, which can be hosted in the same system. They differ by their polarization state and peak intensity. We construct their bifurcation diagram and show that they are connected through a saddle-node bifurcation. Finally, we show that vector cavity solitons exhibit multistability involving different polarization states with different energies.
Published: 2017
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26. Oxide-confined VCSELs fabricated with a simple self-aligned process flow

Author: Ludovic Marigo-Lombart, Guilhem Almuneau, Stephane Calvez, Krassimir Panajotov, Hugo Thienpont, Alexandre Arnoult, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Équipe Photonique (LAAS-PHOTO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Applied Physics and Photonics, Faculty of Engineering, Brussels Photonics Team, Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), and Université Fédérale Toulouse Midi-Pyrénées
Subjects: Materials science, Fabrication, self-aligned, oxidation, Nanotechnology, 02 engineering and technology, 7. Clean energy, 01 natural sciences, VCSEL, Vertical-cavity surface-emitting laser, law.invention, 020210 optoelectronics & photonics, Etching (microfabrication), law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Materials Chemistry, Wafer, Electrical and Electronic Engineering, Lithography, 010302 applied physics, business.industry, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Self-aligned, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Optoelectronics, Dry etching, Photolithography, Photonics, business, lasers
Abstract: International audience; We propose a simplified and easier fabrication process flow for the manufacturing of AlOx-confined VCSELs based on combining the oxidation step with a self-aligned process, allowing the mesa etching and two successive lift-off steps based on a single lithography step. The electro-optical confinement achieved by standard lateral oxidation enables a low threshold and a single mode behaviour for the VCSEL. This simplified process can largely improve VCSEL manufacturing by reducing the processing time and costs compared to the standard VCSEL process. Introduction: Vertical-cavity surface-emitting lasers (VCSEL) have become the preferred light sources in many photonic systems, enabling short-link interconnections [1] but also in other emerging mass-market applications like sensing and detection [2]. The large production volume of VCSELs would benefit from a simplification of the manufacturing process flow that may largely increase the cost-effectiveness. Indeed, compared to the LED and LDs, the VCSEL fabrication process flow requires a large number of elementary steps defined by successive inter-aligned photolithography levels. A precision in the micron range is required to ensure the lateral alignment between the optical waveguide and the electrical injection. For these reasons, one of the most important concerns for the VCSEL manufacturers is to improve the production throughput by lowering the fabrication time and cost per wafer. The development of a self-aligned process is of great interest as already demonstrated for the fabrication of high performance HBT transistors or ridge lasers [3,4]. To that extent, Al-Omari [5] used a top metallic contact deposited over a photoresist layer as a hard mask to dry-etch the VCSEL mesa. Chua [6] developed a pseudo-planar approach by opening via holes down to the AlAs layer to carry out the lateral oxidation. This process has subsequently been improved by Strzelecka [7] to increase the device density. Recently, we have shown that air-post VCSELs could be created using an innovative self-aligned process, which combined several masking and lift-off steps defined by a single lithographic step [8]. In this paper, we extend this work and propose a new process flow to fabricate, in a very simple and straightforward way, the widely-used oxide-confined VCSELs. The demonstrated process drastically simplifies the oxide-confined VCSEL fabrication by reducing the total number of lithographic alignment steps from four or more to only one alignment, with the additional advantage of relieving the required tolerances. This process flow, most suitable for 3D imaging and sensing applications, can also be easily implemented for the fabrication of other optoelectronic devices such as modulators, ridge waveguide lasers, detectors, solar cells or any process combining dry etch, passivation and metallization.
Published: 2017
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27. Analysis of the polarization of single-mode vertical-cavity surface-emitting lasers subject to parallel optical injection

Author: Angel Valle, Luis Pesquera, Krassimir Panajotov, Hugo Thienpont, Alexandra Popp, Marc Sciamanna, Yanhua Hong, Florian Denis-le Coarer, Ana Quirce, Pablo Pérez, Research Foundation - Flanders, Université de Lorraine (France), Ministerio de Economía y Competitividad (España), European Commission, Agence Nationale de la Recherche (France), Institute for Computational Mechanics, Technische Universität Munchen - Université Technique de Munich [Munich, Allemagne] (TUM), Instituto de Física de Cantabria (IFCA), Universidad de Cantabria [Santander]-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Rutgers University [Camden], Rutgers University System (Rutgers), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Applied Physics and Photonics, and Brussels Photonics Team
Subjects: bistability, chaos, Physics::Optics, Optical power, 02 engineering and technology, injection locked, DIODE, 01 natural sciences, 7. Clean energy, PARAMETERS, Vertical-cavity surface-emitting laser, Semiconductor laser theory, 010309 optics, 020210 optoelectronics & photonics, Optics, vcsels, 0103 physical sciences, Vertical cavity surface emitting lasers, 0202 electrical engineering, electronic engineering, information engineering, Spontaneous emission, [NLIN]Nonlinear Sciences [physics], Physics, Semiconductor lasers, business.industry, Orthogonal polarization spectral imaging, Single-mode optical fiber, Statistical and Nonlinear Physics, dynamics, locking, Polarization (waves), SEMICONDUCTOR-LASERS, Atomic and Molecular Physics, and Optics, Injection locking, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Optoelectronics, Bistability, business
Abstract: We investigate experimentally and theoretically the polarization switching found in single-transverse-mode vertical-cavity surface-emitting lasers (VCSELs) when subject to parallel optical injection. Our analysis focuses on a recently observed state in which injection locking of the parallel polarization and excitation of the free-running orthogonal polarization of the VCSEL are obtained. A simple nonlinear dependence between the power of both linear polarizations and the frequency detuning is found. Also, the total power emitted by the VCSEL is constant and independent of the injected optical power and the frequency detuning. We check these results experimentally for a variety of frequency detunings and bias currents applied to the device. We report experimental and theoretical stability maps in the injected power-frequency detuning plane for different bias currents, identifying the regions in which the state is observed. A simple analytical expression that describes the map boundary for large and negative frequency detunings is obtained. This provides a simple method to extract the linear dichroism of the device., Fonds Wetenschappelijk Onderzoek (FWO); Agence Nationale de la Recherche (ANR) (ANR-12-JS03-005); Ser Cymru National Research Network in Advanced Engineering and Materials; Prefecture de Lorraine and SGAR (APOLLO [FEDER/FNADT], PHOTON project [FEDER]); Ministerio de Economia y Competitividad (MINECO/FEDER, UE) (TEC2015-65212-C3-1-P).
Published: 2017
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28. Probing Quantum Memory Effects in the Single Photon Regime

Author: Carlos, Belmonte, VandenBerghe, Frederik, Panajotov, Krassimir, Durt, Thomas, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), CLARTE (CLARTE), Institut FRESNEL (FRESNEL), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), and Durt, Thomas
Subjects: [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], [PHYS.QPHY] Physics [physics]/Quantum Physics [quant-ph], ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2017

29. Développement de briques technologiques pour la fabrication d’un VCSEL avec un modulateur intégré verticalement

Author: Marigo-Lombart, Ludovic, Arnoult, Alexandre, Mazenq, Laurent, Dubreuil, Pascal, Doucet, Jean-Baptiste, Rousset, Bernard, Mauran, Nicolas, Thienpont, Hugo, Panajotov, Krassimir, Almuneau, Guilhem, Équipe Photonique (LAAS-PHOTO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Service Instrumentation Conception Caractérisation (LAAS-I2C), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), and Université Fédérale Toulouse Midi-Pyrénées
Subjects: [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: National audience
Published: 2016

30. Nonlinear Dynamics of Vertical-Cavity Surface-Emitting Lasers: Deterministic Chaos and Random Number Generation

Author: Hugo Thienpont, Krassimir Panajotov, Martin Virte, Marc Sciamanna, Tlidi, Mustapha, Clerc, Marcel, Applied Physics and Photonics, Brussels Photonics Team, Vrije Universiteit Brussel (VUB), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), and Department of Applied Physics and Photonics [Brussels] (TONA)
Subjects: Physics, Polynomial chaos, Chaotic, Physics::Optics, Laser, Polarization (waves), DIODE, 01 natural sciences, SEMICONDUCTOR-LASERS, law.invention, Vertical-cavity surface-emitting laser, 010309 optics, [SPI]Engineering Sciences [physics], Nonlinear system, symbols.namesake, RANDOM BIT GENERATION, law, Optical cavity, 0103 physical sciences, POLARIZATION PROPERTIES, symbols, Stokes parameters, Statistical physics, 010306 general physics
Abstract: Selected Lectures; International audience; We report on chaotic polarization fluctuations generated from a free-running vertical-cavity surface-emitting laser, and investigate in details the VCSEL dynamics and its potential application. We provide new experimental evidences of asymmetrical behaviour of VCSEL polarization dynamics, and show that considering a slight misalignment of the anisotropies of the laser cavity allows to reproduce these dynamics numerically. Finally, we propose a simple scheme for random bit generation exploiting polarization chaos , and experimentally demonstrate a 100 Gbps random generation rate.
Published: 2016
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31. Vertical electro-absorption modulator design and its integration in a VCSEL

Author: Stephane Calvez, Krassimir Panajotov, Hugo Thienpont, Guilhem Almuneau, Alexandre Arnoult, Ludovic Marigo-Lombart, Équipe Photonique (LAAS-PHOTO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Applied Physics and Photonics, Faculty of Engineering, Brussels Photonics Team, Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), and Université de Toulouse (UT)
Subjects: Materials science, Acoustics and Ultrasonics, Optical communication, Physics::Optics, 02 engineering and technology, VCSEL, Vertical-cavity surface-emitting laser, law.invention, 020210 optoelectronics & photonics, law, Electro-absorption modulator, 0202 electrical engineering, electronic engineering, information engineering, Figure of merit, QCSE, Quantum well, business.industry, SURFACE-EMITTING LASERS, PEROT REFLECTION MODULATORS, QUANTUM-WELL STRUCTURES, WAVE-GUIDE MODULATORS, OPTICAL MODULATION, CAVITY LASER, THRESHOLD CHARACTERISTICS, REFRACTIVE-INDEX, GAAS, OPTIMIZATION, modulator, electro-absorption, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Laser, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, CMOS, Modulation, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Optoelectronics, 0210 nano-technology, business
Abstract: International audience; Electro-absorption modulators, either embedded in CMOS technology or integrated with a semiconductor laser, are of high interest for many applications such as optical communications, signal processing and 3D imaging. Recently, the integration of a surface-normal electro-absorption modulator into a vertical-cavity surface-emitting laser has been considered. In this paper we implement a simple quantum well electro-absorption model and design and optimize an asymmetric Fabry–Pérot semiconductor modulator while considering all physical properties within figures of merit. We also extend this model to account for the impact of temperature on the different parameters involved in the calculation of the absorption, such as refractive indices and exciton transition broadening. Two types of vertical modulator structures have been fabricated and experimentally characterized by reflectivity and photocurrent measurements demonstrating a very good agreement with our model. Finally, preliminary results of an electro-absorption modulator vertically integrated with a vertical-cavity surface-emitting laser device are presented, showing good modulation performances required for high speed communications.
Published: 2018
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32. Transverse Mode Switching and Locking in Vertical-Cavity Surface-Emitting Lasers Subject to Orthogonal Optical Injection

Author: Angel Valle, Krassimir Panajotov, Ignace Gatare, Marc Sciamanna, Applied Physics and Photonics, Instituto de Fisica de Cantabria (IFCA), Universidad de Cantabria [Santander]-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Department of Applied Physics and Photonics [Brussels] (TONA), and Vrije Universiteit Brussel (VUB)
Subjects: POLARIZATION PROPERTIES, LIGHT INJECTION, semiconductor lasers, 02 engineering and technology, optical switches, 01 natural sciences, Optical bistability, Semiconductor laser theory, light polarisation, surface emitting lasers, 010309 optics, MECHANISMS, GENERATION, 020210 optoelectronics & photonics, Optics, optical bistability, DYNAMICS, VCSELS, FEEDBACK, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, laser cavity resonators, laser modes, Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Linear polarization, BEHAVIOR, TRANSMISSION, Optical polarization, laser mode locking, Condensed Matter Physics, Polarization (waves), SEMICONDUCTOR-LASERS, Atomic and Molecular Physics, and Optics, Transverse mode, Injection locking, Transverse plane, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, business
Abstract: ©2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.; In this paper, we report on theoretical and experimental investigation on polarization and transverse mode behavior of vertical-cavity surface-emitting lasers (VCSELs) under orthogonal optical injection as a function of the injection strength and of the detuning between the injection frequency and the free-running frequency of the solitary laser. As the injection strength increases the VCSEL switches to the master laser polarization. We find that the injection power necessary to obtain such polarization switching is minimum at two different values of the frequency detuning: the first one corresponds to the frequency splitting between the two linearly polarized fundamental transverse modes, and the second one appears at a larger positive frequency detuning, close to the frequency difference between the first-order and the fundamental transverse modes of the solitary VCSEL. We show theoretically that both the depth and the frequency corresponding to the second minimum increase when the relative losses between the two transverse modes decrease. Bistability of the polarization switching is obtained for the whole frequency detuning range. Such a bistability is found for the fundamental mode only or for both transverse modes, depending on the value of the detuning. The theoretical and experimental optical spectra are in good agreement showing that the first-order transverse mode appears locked to the external injection.
Published: 2007
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33. Optical feedback induced switching between ground and excited state emission in a quantum dot laser diode

Author: Virte, Martin, Breuer , Stefan, Sciamanna, Marc, Panajotov, Krassimir, wolfersberger, delphine, Vrije Universiteit Brussel (VUB), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), and Department of Applied Physics and Photonics [Brussels] (TONA)
Subjects: [PHYS]Physics [physics], [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [NLIN] Nonlinear Sciences [physics], [NLIN]Nonlinear Sciences [physics], ComputingMilieux_MISCELLANEOUS, [PHYS] Physics [physics]
Abstract: International audience
Published: 2015

34. Mapping of the Dynamics Induced by Orthogonal Optical Injection in Vertical-Cavity Surface-Emitting Lasers

Author: Hugo Thienpont, Ignace Gatare, J.B. Altes, Krassimir Panajotov, Marc Sciamanna, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Applied Physics and Photonics, and Vrije Universiteit Brussel
Subjects: Materials science, Physics::Optics, 02 engineering and technology, Optical chaos, 01 natural sciences, Semiconductor laser theory, law.invention, Vertical-cavity surface-emitting laser, 010309 optics, 020210 optoelectronics & photonics, Optics, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Nonlinear optics, Condensed Matter Physics, Laser, Polarization (waves), Atomic and Molecular Physics, and Optics, Transverse mode, Injection locking, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Optoelectronics, business
Abstract: International audience; In this paper, the output characteristics of an oxide-confined AlGaAs-As quantum well vertical-cavity surface-emitting laser (VCSEL) under orthogonal optical injection are mapped as a function of the strength of the optical injection and the detuning between the injection frequency and the free-running frequency of the solitary laser, for a very large range of frequency detuning (from -82 to 89 GHz). The injection light is polarized orthogonally with respect to the solitary VCSEL output light. As the injection strength increases the VCSEL switches to the master laser polarization. Polarization switching is accompanied by a rich nonlinear dynamics, including limit cycle, wave mixing, subharmonic resonance and period doubling route to chaos. Polarization switching is found with but also without injection locking. Injection locking occurs with the slave fundamental transverse mode or, for large positive detunings, with the first-order transverse mode.
Published: 2006
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35. Physical random bit generation from chaotic solitary laser diode

Author: Marc Sciamanna, Martin Virte, Emeric Mercier, Krassimir Panajotov, Hugo Thienpont, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Brussels Photonics Team, and Applied Physics and Photonics
Subjects: Random number generation, Chaotic, Optical communication, FOS: Physical sciences, Physics::Optics, 02 engineering and technology, Optical chaos, 01 natural sciences, law.invention, 010309 optics, 020210 optoelectronics & photonics, Optics, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Entropy (information theory), Randomness, Physics, Laser diode, business.industry, SURFACE-EMITTING LASERS, Laser, Nonlinear Sciences - Chaotic Dynamics, Atomic and Molecular Physics, and Optics, DYNAMICS, AMPLIFICATION, FEEDBACK, SYSTEMS, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Chaotic Dynamics (nlin.CD), business, Optics (physics.optics), INJECTED SEMICONDUCTOR-LASER, Physics - Optics
Abstract: We demonstrate the physical generation of random bits at high bit rates (> 100 Gb/s) using optical chaos from a solitary laser diode and therefore without the complex addition of either external optical feedback or injection. This striking result is obtained despite the low dimension and relatively small bandwidth of the laser chaos, i.e. two characteristics that have been so far considered as limiting the performances of optical chaos-based applications. We unambiguously attribute the successful randomness at high speed to the physics of the laser chaotic polarization dynamics and the resulting growth rate of the dynamical entropy., 14 pages, 3 figures, submitted
Published: 2014
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36. Chaos déterministe dans la dynamique de polarisation d'une diode laser

Author: Sciamanna, Marc, Virte, Martin, Thienpont, Hugo, Panajotov, Krassimir, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), and Van Luchene, Sébastien
Subjects: [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract: National audience
Published: 2014

37. Bistability of time-periodic polarization dynamics in a free-running VCSEL

Author: Marc Sciamanna, Krassimir Panajotov, Martin Virte, Emeric Mercier, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Brussels Photonics Team, and Applied Physics and Photonics
Subjects: Physics, SURFACE-EMITTING LASERS, SEMICONDUCTOR-LASERS, Bistability, business.industry, Linear polarization, Elliptical polarization, Polarization (waves), Atomic and Molecular Physics, and Optics, Semiconductor laser theory, Optics, Amplitude, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, business, Bifurcation, Circular polarization, ANISOTROPIES, MODE
Abstract: We report experimentally a bistability between two limit cycles (i.e. time-periodic dynamics) in a free-running vertical-cavity surface-emitting laser. The two limit cycles originate from a bifurcation on two elliptically polarized states which exhibit a small frequency difference and whose main axes are symmetrical with respect to the linear polarization eigenaxes at threshold. We demonstrate theoretically that this peculiar behavior can be explained in the framework of the spin-flip model model by taking into account a small misalignment between the phase and amplitude anisotropies. (C) 2014 Optical Society of America
Published: 2014
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38. Extreme events driven by feedback in a nonlinear optical cavity

Author: Sciamanna, Marc, Karsaklian Dal Bosco, Andreas, Caullet, Vianney, Mercier, Emeric, Marsal, Nicolas, Wolfersberger, Delphine, Van Luchene, Sébastien, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Department of Applied Physics and Photonics [Brussels] (TONA), and Vrije Universiteit Brussel (VUB)
Subjects: [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2014

39. New insight into laser diode dynamics from phase-conjugate optical feedback

Author: Sciamanna, Marc, Wolfersberger, Delphine, Karsaklian Dal Bosco, Andreas, Mercier, Emeric, Van Luchene, Sébastien, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Department of Applied Physics and Photonics [Brussels] (TONA), and Vrije Universiteit Brussel (VUB)
Subjects: [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2014

40. Introduction to the special issue of Optical and Quantum Electronics related to the workshops 'PHysics and Applications of SEmiconductor LASERs' (PHASE 2007) and 'Instabilities, Patterns and Spatial SOlitons' (IPSSO 2007)

Author: Delphine Wolfersberger, Krassimir Panajotov, Marc Sciamanna, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Institut of the Solid State Physics (ISSP), and Bulgarian Academy of Sciences (BAS)
Subjects: Quantum optics, Physics, business.industry, Nanophotonics, Nanotechnology, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Phase (combat), Atomic and Molecular Physics, and Optics, Field (geography), Electronic, Optical and Magnetic Materials, Semiconductor laser theory, 010309 optics, 0103 physical sciences, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Acronym, Electrical and Electronic Engineering, Photonics, 0210 nano-technology, business, Quantum information science, Telecommunications, ComputingMilieux_MISCELLANEOUS
Abstract: This special issue of Optical and Quantum Electronics is related to the workshops PHASE 2007 and IPSSO 2007, which took place in Supelec, Metz (France) on March 28–30, 2007. The acronym PHASE stands for “PHysics and Applications of SEmiconductor LASERs”. The acronym IPSSO stands for “Instabilities, Patterns and Spatial SOlitons”. The workshops brought together the photonics community in Europe and the scientific program was built to both acknowledge recent advances and emphasize modern trends in this field. The workshop PHASE 2007 was organized in the framework of the European Action COST 288 “Nanoscale andUltrafast Photonics”. COST is the acronym (in French) for “European Cooperation in the Field of Scientific and Technical Research”. It is a framework for international research and development cooperation, allowing for coordination of national research at European level. The main objective of the COST 288 Action is to advance the application of ultrafast nanophotonics to develop high capacity photonic communication infrastructures, as well as to provide a forum to bring forward advanced research on novel topics such as advanced optical signal processing and optical logic, microwave photonics and exploratory technologies (based on nanophotonics) such as quantum communication. PHASE 2007 was a continuation of the workshop PHASE 2005 which also took place at
Published: 2008
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41. Two-mode Dynamics of Vertical-Cavity Surface-Emitting Lasers

Author: Panajotov, Krassimir, Virte, Martin, Thienpont, Hugo, Sciamanna, Marc, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), OPTEL - Equipe Optique et électronique pour les télécoms, Vrije Universiteit Brussel (VUB)-Vrije Universiteit Brussel (VUB), and Van Luchene, Sébastien
Abstract: International audience; We first report on recently experimentally discovered two-mode dynamics in solitary Vertical-Cavity Surface-Emitting Lasers (VCSELs), which manifests the microscopic spin-flip processes taking place in the semiconductor quantum dots (QD)[1] We demonstrate that such dynamics leads to polarization chaos, a new phenomenon for class B semiconductor lasers. Our QD-VCSEL emits linearly polarized light at threshold and undergoes a pitchfork bifurcation when increasing injection current that creates two symmetrical elliptically polarized solutions ( Fig. 1a). Then, a sequence of bifurcations (Fig. 1b) brings it to two single-scroll chaotic attractors oscillating around the now unstable elliptically polarized steady-states (Fig.1c). Finally, the two chaotic attractors merge into a double-scroll "butterfly" chaotic attractor (Fig.1d). Experimentally, this "butterfly" attractor is observed as a mode hopping between two elliptically polarized modes (Fig.1e,f) [2]. The dwell time, i.e. the average time between two successive jumps exponentially decreases with injection current which is opposite to noise-induced polarization mode hopping in quantum well VCSELs [3]. Next, we review the features of VCSEL nonlinear dynamics induced by optical injection and optical feedback that are due to the lack of polarization anisotropy and to multiple transverse mode operation. In case of optical injection we demonstrate a new Hopf bifurcation on a two-polarization-mode solution that delimits the injection locking region and a new resonance tongue for large positive detunings that is due to polarization switching and injection locking of first-order transverse mode [4]. For the case of optical feedback in VCSELs[5] we show that for long and short external cavities the Lang-Kobayashi model is in good agreement with experiments on polarization switching, mode hopping and antiphase oscillatory dynamics at the delay time. These last dynamics modify polarization residence-time distribution making it oscillatory. We demonstrate numerically and experimentally coherence resonance in such bistable, time-delayed optical system. We present results on low frequency fluctuation and pulse-package dynamics in VCSELs and discuss the role of light polarization.
Published: 2013

42. Optical feedback induces bistability between ground and excited states in quantum dot lasers

Author: Virte, Martin, Panajotov, Krassimir, Sciamanna, Marc, OPTEL - Equipe Optique et électronique pour les télécoms, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB)-Vrije Universiteit Brussel (VUB), Vrije Universiteit Brussel (VUB), and Van Luchene, Sébastien
Subjects: ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2013

43. From mode competition to polarization chaos in free-running VCSELs

Author: Virte, Martin, Panajotov, Krassimir, Thienpont, Hugo, Sciamanna, Marc, OPTEL - Equipe Optique et électronique pour les télécoms, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB)-Vrije Universiteit Brussel (VUB), Vrije Universiteit Brussel (VUB), and Van Luchene, Sébastien
Subjects: ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2013

44. Impact of optical feedback on a quantum dot laser emitting simultaneously from the ground and excited states

Author: Martin Virte, Marc Sciamanna, Krassimir Panajotov, OPTEL - Equipe Optique et électronique pour les télécoms, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB)-Vrije Universiteit Brussel (VUB), Vrije Universiteit Brussel (VUB), and Van Luchene, Sébastien
Subjects: Physics, Distributed feedback laser, Active laser medium, 02 engineering and technology, 021001 nanoscience & nanotechnology, Laser, 01 natural sciences, Semiconductor laser theory, law.invention, 010309 optics, Quantum dot, Quantum dot laser, law, Excited state, 0103 physical sciences, Atomic physics, 0210 nano-technology, Ground state
Abstract: Summary form only given. When using quantum dot (QD) as an active region for semiconductor laser, one can confine more than one energy level, thus allowing laser effect to take place in the ground state (GS), the excited state (ES) or both simultaneously [1]. In this contribution we theoretically consider the impact of optical feedback on the mode competition between GS and ES emission. Using an analytical approach, continuation techniques and numerical integration we provide a detailed analysis of the steady-states and bifurcation scenarios predicted, thus bringing new light on recent experiments [2].
Published: 2013

45. Mode competition induced by optical feedback in two-color quantum dot lasers

Author: Martin Virte, Marc Sciamanna, Krassimir Panajotov, OPTEL - Equipe Optique et électronique pour les télécoms, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB)-Vrije Universiteit Brussel (VUB), Vrije Universiteit Brussel (VUB), Brussels Photonics Team, and Applied Physics and Photonics
Subjects: Optical amplifier, Physics, Distributed feedback laser, LOW-FREQUENCY FLUCTUATIONS, EXCITED-STATE, Physics::Optics, Condensed Matter Physics, Laser, 01 natural sciences, Atomic and Molecular Physics, and Optics, Optical bistability, law.invention, 010309 optics, Optical phase space, Quantum dot laser, law, 0103 physical sciences, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Electrical and Electronic Engineering, Atomic physics, 010306 general physics, Ground state, Lasing threshold
Abstract: International audience; We investigate theoretically the impact of optical feedback on quantum dot two-color laser dynamics when emitting from both the excited and the ground states. Detailed analysis of the laser dynamics is provided by numerical integrations and continuation techniques, as well as by analytical methods. As the feedback strength is increased the quantum dot laser undergoes a sequence of bifurcations involving steady-states, external cavity modes, self-pulsations and chaos. Furthermore, we report on two interesting mode competition results. First, the optical feedback favors the ground state emission; hence an increase of the feedback strength will generally lead to an increase of the ground state emission output power. Second, the optical feedback can select one lasing state or induce bistable switchings between different steady-states depending on the feedback strength and the injection current.
Published: 2013
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46. Bifurcation to nonlinear polarization dynamics and chaos in vertical-cavity surface-emitting lasers

Author: Martin Virte, Marc Sciamanna, Krassimir Panajotov, OPTEL - Equipe Optique et électronique pour les télécoms, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB)-Vrije Universiteit Brussel (VUB), Vrije Universiteit Brussel (VUB), Institut of the Solid State Physics (ISSP), Bulgarian Academy of Sciences (BAS), Brussels Photonics Team, and Applied Physics and Photonics
Subjects: Physics, ANISOTROPIES, TEMPERATURE, MECHANISMS, Fundamental frequency, Elliptical polarization, Polarization (waves), Laser, 01 natural sciences, Atomic and Molecular Physics, and Optics, Vertical-cavity surface-emitting laser, Semiconductor laser theory, law.invention, Computational physics, SEMICONDUCTOR-LASERS, MODE, 010309 optics, Light intensity, law, Limit cycle, 0103 physical sciences, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, 010306 general physics
Abstract: In this contribution we provide an in depth theoretical analysis of the bifurcations leading to nonlinear polarization dynamics in a free-running vertical-cavity surface-emitting laser (VCSEL). We detail the sequence of bifurcations that occurs when increasing the injection current, and which brings the laser from linear to elliptical polarization emission and then self-pulsating or even more complex chaotic dynamics of the light intensity. Continuation techniques allow us to follow the stable and unstable limit cycle solutions emerging from Hopf bifurcations, and therefore to interpret the frequency of the self-pulsating polarization dynamics. The fundamental frequency of the pulsating dynamics is either close to the laser relaxation oscillation frequency or close to the linear-birefringence-induced polarization mode frequency splitting, depending on the laser parameters. A systematic analysis of the parameter space allows us to identify two scenarios that are in excellent qualitative agreement with those reported in recent experiments. Our results provide, moreover, evidence for an interesting polarization mode hopping mechanism, i.e., a so-called deterministic mode hopping where the laser exhibits a chaotic and therefore random-like hopping between two states that are elliptically polarized and nonorthogonal. DOI: 10.1103/PhysRevA.87.013834
Published: 2013
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47. Feedback stabilization of discrete-time quantum systems subject to non-demolition measurements with imperfections and delays

Author: Hadis Amini, Igor Dotsenko, C. Sayrin, Ram Somaraju, Pierre Rouchon, Mazyar Mirrahimi, Centre Automatique et Systèmes (CAS), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), SIgnals and SYstems in PHysiology & Engineering (SISYPHE), Inria Paris-Rocquencourt, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Laboratoire Kastler Brossel (LKB (Lhomond)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Kastler Brossel (LKB [Collège de France]), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Collège de France (CdF (institution)), Mines Paris - PSL (École nationale supérieure des mines de Paris), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Collège de France (CdF (institution))
Subjects: 0209 industrial biotechnology, Markov process, 02 engineering and technology, 01 natural sciences, symbols.namesake, 020901 industrial engineering & automation, [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], Control theory, 0103 physical sciences, Quantum system, FOS: Mathematics, Statistical physics, Electrical and Electronic Engineering, 010306 general physics, Mathematics - Optimization and Control, Mathematics, Markov chain, Stochastic matrix, Cavity quantum electrodynamics, Observable, Metzler matrix, Control and Systems Engineering, Optimization and Control (math.OC), symbols, [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC], Stationary state
Abstract: We consider a controlled quantum system whose finite dimensional state is governed by a discrete-time nonlinear Markov process. In open-loop, the measurements are assumed to be quantum non-demolition (QND). The eigenstates of the measured observable are thus the open-loop stationary states: they are used to construct a closed-loop supermartingale playing the role of a strict control Lyapunov function. The parameters of this supermartingale are calculated by inverting a Metzler matrix that characterizes the impact of the control input on the Kraus operators defining the Markov process. The resulting state feedback scheme, taking into account a known constant delay, provides the almost sure convergence of the controlled system to the target state. This convergence is ensured even in the case where the filter equation results from imperfect measurements corrupted by random errors with conditional probabilities given as a left stochastic matrix. Closed-loop simulations corroborated by experimental data illustrate the interest of such nonlinear feedback scheme for the photon box, a cavity quantum electrodynamics system., Comment: submitted (16 pages, 4 figures)
Published: 2013
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48. Deterministic polarization chaos from a laser diode

Author: Marc Sciamanna, Martin Virte, Krassimir Panajotov, Hugo Thienpont, OPTEL - Equipe Optique et électronique pour les télécoms, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), Brussels Photonics Team, and Applied Physics and Photonics
Subjects: SEMICONDUCTOR-LASER, LYAPUNOV EXPONENTS, Chaotic, FOS: Physical sciences, Physics::Optics, Lyapunov exponent, Elliptical polarization, SURFACE-EMITTING LASERS, RANDOM BIT GENERATION, NONLINEAR DYNAMICS, TIME-SERIES, CAVITY, 01 natural sciences, law.invention, 010309 optics, symbols.namesake, Optics, law, 0103 physical sciences, 010306 general physics, Nonlinear coupling, Physics, Laser diode, FEEDBACK, INSTABILITIES, COMMUNICATION, business.industry, Polarization (waves), Laser, Nonlinear Sciences - Chaotic Dynamics, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Nonlinear Sciences::Chaotic Dynamics, Nonlinear system, symbols, Optoelectronics, Chaotic Dynamics (nlin.CD), business, Physics - Optics, Optics (physics.optics)
Abstract: Fifty years after the invention of the laser diode and fourty years after the report of the butterfly effect - i.e. the unpredictability of deterministic chaos, it is said that a laser diode behaves like a damped nonlinear oscillator. Hence no chaos can be generated unless with additional forcing or parameter modulation. Here we report the first counter-example of a free-running laser diode generating chaos. The underlying physics is a nonlinear coupling between two elliptically polarized modes in a vertical-cavity surface-emitting laser. We identify chaos in experimental time-series and show theoretically the bifurcations leading to single- and double-scroll attractors with characteristics similar to Lorenz chaos. The reported polarization chaos resembles at first sight a noise-driven mode hopping but shows opposite statistical properties. Our findings open up new research areas that combine the high speed performances of microcavity lasers with controllable and integrated sources of optical chaos., Comment: 13 pages, 5 figures
Published: 2013
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49. Bistability of Limit Cycles in a Free‐Running VCSEL

Author: Mercier, Emeric, Virte, Martin, Panajotov, Krassimir, Sciamanna, Marc, Van Luchene, Sébastien, SUPELEC-Campus Metz, Ecole Supérieure d'Electricité - SUPELEC (FRANCE), OPTEL - Equipe Optique et électronique pour les télécoms, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB)-Vrije Universiteit Brussel (VUB), and Vrije Universiteit Brussel (VUB)
Subjects: ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2013

50. Polarization Chaos from a Free-Running Quantum Dot Laser Diode

Author: Virte, Martin, Panajotov, Krassimir, Sciamanna, Marc, Van Luchene, Sébastien, OPTEL - Equipe Optique et électronique pour les télécoms, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB)-Vrije Universiteit Brussel (VUB), and Vrije Universiteit Brussel (VUB)
Subjects: Nonlinear Sciences::Chaotic Dynamics
Abstract: International audience; In this contribution, we demonstrate generation of polarization chaos, i.e. chaotic mode hopping between two elliptically polarized states, in a free-running quantum dot vertical-cavity surface-emitting laser and provide a theoretical framework of the phenomenon.
Published: 2013

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