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Your search keyword '"Thierry Georges"' showing total 5 results
Start Over Author "Thierry Georges" Publisher optica publishing group
5 results on '"Thierry Georges"'

1. Deep-red double-clad fiber laser at 717 nm

Author

Esrom Kifle, Pavel Loiko, Thibaud Berthelot, Thiphaine Rault, Laurine Bodin, Florence Pau, Gilles Recoque, Thierry Georges, and Patrice Camy

Subjects
Atomic and Molecular Physics, and Optics
Abstract

We report on a double-clad fiber laser operating on the 3P0 → 3F4 Pr3+ transition (in the deep-red spectral range) pumped by a GaN diode laser at ∼442 nm. It employs a 0.8-mol% PrF3-doped ZBLAN double-clad fiber with a 7.5-µm core, a double D-shaped inner cladding, and a length of 3.0 m. The laser delivers a maximum output power of 0.71 W at 716.7 nm with a slope efficiency of 9.0% (versus the launched pump power) and a laser threshold of 0.90 W. The laser emission is partially polarized. The laser performance is simulated providing a guideline for watt-level deep-red fiber laser sources.

Published
2023
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2. Diode-Pumped Deep-Red (717 nm) Double-Clad Praseodymium Fiber Laser

Author

Esrom Kifle, Pavel Loiko, Laurine Bodin, Franck Joulain, Thibaud Berthelot, Samuel Poulain, Gilles Recoque, Florence Pau, Thierry Georges, and Patrice Camy

Abstract

We report on a deep-red fiber laser delivering 0.71 W at 716.7 nm with a slope efficiency of 9.0%. It is based on a Pr3+-doped ZBLAN double-clad fiber pumped by a 442-nm GaN diode.

Published
2022
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3. Watt-level visible laser in double-clad Pr3+-doped fluoride fiber pumped by a GaN diode

Author

Damien Deubel, Dragan Stojcevski, Pavel Loiko, Florent Starecki, Franck Joulain, Solenn Cozic, Thierry Georges, Thibaud Berthelot, Esrom Kifle, Patrice Camy, Optique, Matériaux et Laser (OML), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), and Normandie Université (NU)

Subjects
Materials science, Praseodymium, chemistry.chemical_element, 02 engineering and technology, 01 natural sciences, law.invention, 010309 optics, chemistry.chemical_compound, Optics, law, ZBLAN, Fiber laser, 0103 physical sciences, ComputingMilieux_MISCELLANEOUS, Diode, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Multi-mode optical fiber, business.industry, Slope efficiency, 021001 nanoscience & nanotechnology, Laser, Cladding (fiber optics), Atomic and Molecular Physics, and Optics, chemistry, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], 0210 nano-technology, business
Abstract

We report on a red praseodymium fiber laser delivering 1.07 W at 634.5 nm with a slope efficiency of 20.7% (versus the incident pump), a laser threshold of 0.55 W, and a single-mode output ( M x , y 2 < 1.1 ) in the quasi-continuous-wave regime. It is based on a 0.6 mol.% P r 3 + -doped ZBLAN double-clad fiber with a 5.5 µm core, a double D-shaped (diameters, 115/125 µm) inner cladding, and a length of 5.0 m. The fiber is pumped by a multimode 443 nm GaN diode. The laser design is optimized using a numerical model. The proposed concept is suitable for the development of diode-pumped high brightness watt-level visible praseodymium fiber lasers.

Published
2020
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4. Watt-level diode-pumped thulium lasers around 2.3 µm

Author

Pavel Loiko, Florent Starecki, Patrice Camy, Jean-Louis Doualan, Lauren Guillemot, Thierry Georges, Julien Rouvillain, Alain Braud, Esrom Kifle, Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), OXXIUS, Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and ANR-19-CE08-0028,SPLENDID2,Lasers solides et amplificateurs à impulsions courtes au-delà de 2 µm(2019)

Subjects
[PHYS]Physics [physics], Materials science, business.industry, Slope efficiency, chemistry.chemical_element, Laser, 7. Clean energy, 01 natural sciences, Atomic and Molecular Physics, and Optics, law.invention, Power (physics), 010309 optics, Wavelength, Optics, Thulium, chemistry, law, Fiber laser, 0103 physical sciences, Quantum efficiency, Electrical and Electronic Engineering, business, Engineering (miscellaneous), ComputingMilieux_MISCELLANEOUS, Diode
Abstract

We report on efficient diode-pumped mid-infrared lasers based on T m : L i Y F 4 , T m : Y 3 A l 5 O 12 , and T m : Y A l O 3 crystals. These lasers operate in the continuous-wave (CW) regime and deliver watt-level output power at the wavelengths of 2.2–2.3 µm (the 3 H 4 → 3 H 5 T m 3 + transition). In particular, a 1.8 at. % T m : Y A l O 3 laser pumped at 789 nm generates a maximum CW output power of 1.32 W at 2272–2277 nm with a slope efficiency of 33.1% (with respect to the absorbed pump power), a linear laser polarization ( E ∥ b ), and a fundamental transverse output mode (the measured M x 2 = 1.26 , M y 2 = 1.68 ). In the quasi-CW regime, the output peak power is scaled up to 2.69 W. The pump quantum efficiency and the fractional heat loading are estimated and discussed.

Published
2020
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5. WDM soliton transmission in dispersion-managed links

Author

F. Favre and Thierry Georges

Subjects
Physics, Soliton transmission, Optics, Transmission (telecommunications), Physics::Instrumentation and Detectors, Gigabit, business.industry, Wavelength-division multiplexing, Transmission quality, Dispersion managed, Transmission system, Span (engineering), business
Abstract

The transmission of 20 Gbit/s path-averaged solitons with in-line control is possible over unlimited distances [1]. In such experiments, Kerr nonlinearity is not a limitation but is used to separate the signal from the noise. Unfortunately, this transmission technique does not allow the increase of the bit rate of a single channel to much more than 40 Gbit/s nor the increase of the overall bit rate with help of Wavelength Division Multiplexing (WDM) because of the Four Wave Mixing (FWM) [2]. The other drawback is the incompatibility to the Non Dispersion Shifted Fibre (NDSF) or standard fibre in the terrestrial networks.

Published
1998
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