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Your search keyword '"Julien Rouvillain"' showing total 3 results
Start Over Author "Julien Rouvillain" Topic 0103 physical sciences
3 results on '"Julien Rouvillain"'

1. Narrow linewidth near-UV InGaN laser diode based on external cavity fiber Bragg grating

Author

Antoine Congar, Mathilde Gay, Georges Perin, Dominique Mammez, Jean-Claude Simon, Pascal Besnard, Julien Rouvillain, Thierry Georges, Laurent Lablonde, Thierry Robin, and Stéphane Trebaol

Subjects
Fabrication, Materials science, FOS: Physical sciences, Physics::Optics, 02 engineering and technology, 01 natural sciences, law.invention, 010309 optics, Laser linewidth, Narrowband, Optics, Fiber Bragg grating, law, 0103 physical sciences, Physics::Atomic Physics, Diode, Laser diode, business.industry, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Interferometry, Whispering-gallery wave, 0210 nano-technology, business, Optics (physics.optics), Physics - Optics
Abstract

We realize a fiber Bragg grating InGaN-based laser diode emitting at 400 nm and demonstrate its high coherency. Thanks to the fabrication of a narrowband fiber Bragg grating in the near-UV, we can reach single-mode and single-frequency regimes for the self-injection locked diode. The device exhibits 44 dB side-mode suppression ratio and mW output power. Detailed frequency noise analysis reveals sub-MHz integrated linewidth and 16 kHz intrinsic linewidth. Such a narrow linewidth laser diode in the near-UV domain with a compact and low-cost design could find applications whenever coherency and interferometric resolutions are needed.

Published
2021

2. 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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3. Nd Concentration Optimization for Efficient Low-cost 473 nm Diode Pumped Nd:YAG/KNbO3 Microchip Assembly

Author

Yohann Garin, Patrice Feron, Raymond Le Bras, Thierry Georges, Julien Rouvillain, OXXIUS, Fonctions Optiques pour les Technologies de l'informatiON (FOTON), Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne, Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne-Centre National de la Recherche Scientifique (CNRS)

Subjects
Blue laser, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, Laser diode, business.industry, 02 engineering and technology, Integrated circuit, Laser, 01 natural sciences, Semiconductor laser theory, law.invention, 010309 optics, 020210 optoelectronics & photonics, Optics, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Optoelectronics, Laser beam quality, business, Noise (radio), Diode
Abstract

conference 5332 « Solid State Lasers XIII: Technology and Devices », session 5 « Compact Laser Sources » [5332-21]; International audience; Although powerful (2.8 W) blue emission at 473 nm was recently reported, the design of low-cost compact and efficient 473 nm source failed so far. We have theoretically and experimentally analyzed the operation of a simple 2.1 mm long microchip assembly pumped by a 100x1 μm laser diode and found several ways to improve the efficiency of such a laser. As a first result, we achieved high beam quality (M2

Published
2004
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