9 results on '"Raphaël Jauberteau"'
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2. Boosting and Taming Wave Breakup in Second Harmonic Generation
- Author
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Raphaël Jauberteau, Sahar Wehbi, Tigran Mansuryan, Katarzyna Krupa, Fabio Baronio, Benjamin Wetzel, Alessandro Tonello, Stefan Wabnitz, and Vincent Couderc
- Subjects
second-harmonic (SH) generation (SHG) ,statistical optics ,optical instabilities ,optical chaos and complexity ,optical spatio-temporal dynamics ,optical soliton ,Physics ,QC1-999 - Abstract
Modulation instability is a universal phenomenon that can be found in a wide variety of nonlinear systems where, in the presence of a noise seed, peaks of random intensities can be generated. Several dynamical systems admit exact solutions in the form of breathers or solitons on a finite background. The vast majority of soliton studies has been restricted so far to one-dimensional systems. In contrast, the occurrences of localized structures in fully spatiotemporal systems has been only sporadically explored. In this work, we experimentally study the conditions for the wave-breaking of spatially extended optical beams in the process of second harmonic generation. Whenever the pump energy of the picosecond-long fundamental beam reaches a critical level, the beam shape at the second harmonic in a KTP crystal breaks into small filaments. These filaments exhibit extreme local intensity peaks, and their statistical distribution can be modified by the input energy of the fundamental beam. Moreover, by analyzing similar wave-breaking dynamics in a PPLN crystal in the presence of a higher nonlinear quadratic response, we observe that the spatial beam breaking may even gradually vanish as the laser intensity grows larger, leading to a spatial reshaping into a smooth and wider beam, accompanied by a substantial broadening of its temporal spectrum.
- Published
- 2021
- Full Text
- View/download PDF
3. Dissipative Kerr solitons, breathers, and chimera states in coherently driven passive cavities with parabolic potential
- Author
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Yifan Sun, Pedro Parra-Rivas, Mario Ferraro, Fabio Mangini, Mario Zitelli, Raphaël Jauberteau, Francesco Rinaldo Talenti, and Stefan Wabnitz
- Subjects
FOS: Physical sciences ,Pattern Formation and Solitons (nlin.PS) ,Nonlinear Sciences - Pattern Formation and Solitons ,Atomic and Molecular Physics, and Optics ,Optics (physics.optics) ,Physics - Optics - Abstract
We analyze the stability and dynamics of dissipative Kerr solitons (DKSs) in the presence of a parabolic potential. This potential stabilizes oscillatory and chaotic regimes, favoring the generation of static DKSs. Furthermore, the potential induces the emergence of new dissipative structures, such as asymmetric breathers and chimera-like states. Based on a mode decomposition of these states, we unveil the underlying modal interactions.
- Published
- 2022
4. Self-cleaning on a higher order mode in Ytterbium-doped multimode fiber with parabolic profile
- Author
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Alioune Niang, Vincent Couderc, Alessandro Tonello, Katarzyna Krupa, Mesay Addisu, Raphaël Jauberteau, Marc Fabert, Daniele Modotto, Stefan Wabnitz, Laboratoire de Photonique d'Angers (LPHIA), Université d'Angers (UA), Photonique Fibre et Sources Cohérentes (XLIM-PHOT), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Franche-Comté (UFC)-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Technologie de Belfort-Montbeliard (UTBM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), University of Brescia, univesité de brescia, Department of Information Engineering, Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
010309 optics ,optical fibers ,Kerr effect ,nonlinear optics ,0103 physical sciences ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,02 engineering and technology ,[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics ,021001 nanoscience & nanotechnology ,0210 nano-technology ,01 natural sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2019
- Full Text
- View/download PDF
5. Spatial Beam Cleaning in Multimode GRIN Fibers: Polarization Effects
- Author
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Mario Ferraro, Fabio Mangini, Mario Zitelli, Raphael Jauberteau, Yifan Sun, Pedro Parra-Rivas, Katarzyna Krupa, Alessandro Tonello, Vincent Couderc, and Stefan Wabnitz
- Subjects
Kerr effect ,multimode fibers ,nonlinear optics ,polarization of light ,self-cleaning ,Applied optics. Photonics ,TA1501-1820 ,Optics. Light ,QC350-467 - Abstract
The beam self-cleaning effect in graded-index multimode optical fibers has several interesting potential applications, such as high-resolution nonlinear imaging and mode-locked fiber lasers. Most experimental and theoretical studies of beam self-cleaning have neglected the role of the state of polarization of light. In this work, we fill this gap by reporting extensive experimental investigations of beam self-cleaning in multimode fibers, for beams with different input states of light polarization. We found that the state of polarization undergoes a complex evolution, which may lead either to full conservation of the input state of polarization, or to nearly complete light depolarization at the fiber output. The former outcome is compelling for applications based on the beam self-cleaning effect, such as multimode mode-locked fiber lasers for micromachining, and multimode devices for microscopy and endoscopy. The latter result, instead, permits to test the limits of validity of current purely scalar theoretical approaches for describing nonlinear propagation in multimode fibers.
- Published
- 2023
- Full Text
- View/download PDF
6. Boosting and Taming Wave Breakup in Second Harmonic Generation
- Author
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Raphaël Jauberteau, Sahar Wehbi, Tigran Mansuryan, Katarzyna Krupa, Fabio Baronio, Benjamin Wetzel, Alessandro Tonello, Stefan Wabnitz, Vincent Couderc, Photonique Fibre et Sources Cohérentes (XLIM-PHOT), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Department of Information Engineering [Brescia], Università degli Studi di Brescia [Brescia], ALPhANOV, Polish Academy of Sciences (PAN), and Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome]
- Subjects
optical fibers ,Breather ,second-harmonic (SH) generation (SHG) ,Materials Science (miscellaneous) ,Biophysics ,optical spatio-temporal dynamics ,General Physics and Astronomy ,rogue wave ,01 natural sciences ,Noise (electronics) ,Instability ,optical instabilities ,010309 optics ,[NLIN.NLIN-PS]Nonlinear Sciences [physics]/Pattern Formation and Solitons [nlin.PS] ,Kerr effect ,optical soliton ,0103 physical sciences ,Physical and Theoretical Chemistry ,010306 general physics ,Mathematical Physics ,Physics ,[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] ,second harmonic generation ,[PHYS.PHYS.PHYS-ATM-PH]Physics [physics]/Physics [physics]/Atomic and Molecular Clusters [physics.atm-clus] ,nonlinear optics ,statistical optics ,Second-harmonic generation ,optical solitons ,[PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph] ,lcsh:QC1-999 ,Computational physics ,Nonlinear system ,Harmonic ,optical chaos and complexity ,Soliton ,Beam (structure) ,lcsh:Physics - Abstract
International audience; Modulation instability is a universal phenomenon that can be found in a wide variety of nonlinear systems where, in the presence of a noise seed, peaks of random intensities can be generated. Several dynamical systems admit exact solutions in the form of breathers or solitons on a finite background. The vast majority of soliton studies has been restricted so far to one-dimensional systems. In contrast, the occurrences of localized structures in fully spatiotemporal systems has been only sporadically explored. In this work, we experimentally study the conditions for the wave-breaking of spatially extended optical beams in the process of second harmonic generation. Whenever the pump energy of the picosecond-long fundamental beam reaches a critical level, the beam shape at the second harmonic in a KTP crystal breaks into small filaments. These filaments exhibit extreme local intensity peaks, and their statistical distribution can be modified by the input energy of the fundamental beam. Moreover, by analyzing similar wave-breaking dynamics in a PPLN crystal in the presence of a higher nonlinear quadratic response, we observe that the spatial beam breaking may even gradually vanish as the laser intensity grows larger, leading to a spatial reshaping into a smooth and wider beam, accompanied by a substantial broadening of its temporal spectrum.
- Full Text
- View/download PDF
7. Latest experimental advances in nonlinear multimode fiber optics
- Author
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Raphaël Jauberteau, Sahar Wehbi, Tigran Mansuryan, Katarzyna Krupa, Fabio Baronio, Benjamin Wetzel, Alejandro Aceves, Alessandro Tonello, Stefan Wabnitz, Vincent Couderc, Photonique Fibre et Sources Cohérentes (XLIM-PHOT), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Brescia [Brescia], ALPhANOV, Polish Academy of Sciences (PAN), Southern Methodist University (SMU), Dipartimento di Ingegneria dell'Informazione, Elettronica e Telecomunicazioni [Roma] (DIET), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], and Novosibirsk State University (NSU)
- Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] ,[NLIN.NLIN-PS]Nonlinear Sciences [physics]/Pattern Formation and Solitons [nlin.PS] ,[PHYS.PHYS.PHYS-ATM-PH]Physics [physics]/Physics [physics]/Atomic and Molecular Clusters [physics.atm-clus] ,ComputingMilieux_MISCELLANEOUS ,[PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph] - Abstract
International audience
8. Boosting and Taming Wave Breakup in Second Harmonic Generation
- Author
-
'Raphaël Jauberteau
9. Twin spotlight beam generation in quadratic crystals
- Author
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Raphaël Jauberteau, Sahar Wehbi, Tigran Mansuryan, Alessandro Tonello, Fabio Baronio, Katarzyna Krupa, Benjamin Wetzel, Stefan Wabnitz, and Vincent Couderc
- Subjects
General Physics and Astronomy ,FOS: Physical sciences ,Pattern Formation and Solitons (nlin.PS) ,Nonlinear Sciences - Pattern Formation and Solitons ,Physics - Optics ,Optics (physics.optics) - Abstract
Optical rogue waves have been extensively studied in the past two decades. However, observations of multidimensional extreme wave events remain surprisingly scarce. In this work we present the experimental demonstration of the spontaneous generation of spatially localized two-dimensional beams in a quadratic nonlinear crystal, which are composed by twin components at the fundamental and the second-harmonic frequencies. These localized spots of light emerge from a wide background beam, and eventually disappear as the laser beam intensity is progressively increased.
- Full Text
- View/download PDF
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