Gaëlle Lucas-leclin - Academia.edu (original) (raw)

Papers by Gaëlle Lucas-leclin

HAL (Le Centre pour la Communication Scientifique Directe), Jan 23, 2015

Optics Express, Jan 11, 2019

 Users may download and print one copy of any publication from the public portal for the purpose... more  Users may download and print one copy of any publication from the public portal for the purpose of private study or research.  You may not further distribute the material or use it for any profit-making activity or commercial gain  You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

HAL (Le Centre pour la Communication Scientifique Directe), Sep 27, 2009

Proceedings of SPIE, Apr 30, 2010

Phase-locked operation of an array of ten diode lasers is demonstrated in an extended-cavity usin... more Phase-locked operation of an array of ten diode lasers is demonstrated in an extended-cavity using the Talbot selfimaging effect. An output power up to 1.7 W has been obtained. The extracavity coherent conversion of the multilobed array supermode into a Gaussian mode is investigated theoretically based on a binary phase grating. The best configuration results in a conversion efficiency of 83%. Experimentally, the conversion efficiency reaches 50% and is limited by the imperfect coherence of the laser array. We conclude that the conversion setup provides an actual measurement of the power in the selected array supermode.

Comptes Rendus De L Academie Des Sciences Serie Iv Physique Astrophysique, Jul 1, 2000

Nous présentons les performances d'un laser solide pompé par diode émettant dans le visible par a... more Nous présentons les performances d'un laser solide pompé par diode émettant dans le visible par autodoublage de fréquence. Une puissance continue de 115 mW à 545 nm a été obtenue à partir d'un cristal de Nd : GdCa4O(BO3)3 placé dans une cavité stable du type « concave-concave » et pompé par une diode laser émettant une puissance de 2 W à 811 nm. Dans le cas d'une cavité plan-plan, simulant un microlaser monolithique, nous avons obtenu une puissance record de 22 mW dans le vert. © 2000 Académie des sciences/Éditions scientifiques et médicales Elsevier SAS laser solide / pompage par diode / optique non linéaire Development of visible diode-pumped solid-state lasers based on self-frequency doubling Nd : GdCOB crystals

Proceedings of SPIE, Feb 9, 2012

An external cavity using a binary phase grating has been developed to achieve coherent combining ... more An external cavity using a binary phase grating has been developed to achieve coherent combining of five quantumcascade lasers emitting at 4:65 μm. The grating phase profile is designed to combine five beams of equal intensities into a single beam with a good efficiency (∼75%). The performances of this cavity concerning output power, stability, combining efficiency and beam quality are detailed. We report a CW combining efficiency of 66% corresponding to an output power of ∼0:5 W with a good beam quality (M 2 <1:6).

... Lucas-Leclin, G.; Balembois, F.; Georges, P.; Brun, A.; Marty, J.; Ferrand, B.; Pelenc, D.; C... more ... Lucas-Leclin, G.; Balembois, F.; Georges, P.; Brun, A.; Marty, J.; Ferrand, B.; Pelenc, D.; Calvat, C.; Francois, B.; Rolland, G.; Aka, G.; Vivien, D.; Pacaud, O ... Fabrication and evaluation of new compact green sources based on diode-pumped Nd:GdCOB microchips are reported. ...

ABSTRACT We report on the design and characterization of a single-frequency diode-pumped vertical... more ABSTRACT We report on the design and characterization of a single-frequency diode-pumped vertical external-cavity surface-emitting laser emitting at 852 nm for Caesium atomic clock experiments. Up to 120 mW under 1.1 W pumping is achieved.

Proceedings of SPIE, Feb 7, 2008

This work reports on an optically-pumped vertical external-cavity surface-emitting laser (VECSEL)... more This work reports on an optically-pumped vertical external-cavity surface-emitting laser (VECSEL) emitting around 852 nm for Cesium atomic clocks experiments. We describe the design and the characterization of a VECSEL semiconductor structure suitable for these applications. The parameters of the structure have been optimized in order to have a low threshold and a high gain structure emitting around 852 nm. We achieved an output power of 330 mW for 1.1 W of incident pump power. We are able to simulate the laser emission variations with the temperature of the substrate, the pump radius on the semiconductor structure and the losses inside cavity. A compact and robust setup was built to obtain a stable single-frequency emission. We obtained a 17-mW single frequency emission exhibiting broad and fine tunability around the Cesium D 2 line.

Optics Letters, Jan 11, 2023

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Copyright

HAL (Le Centre pour la Communication Scientifique Directe), Sep 18, 2014

We demonstrate a rear-side phase-locking architecture with two high-brightness diode lasers. This... more We demonstrate a rear-side phase-locking architecture with two high-brightness diode lasers. This technique is based on the passive phase-locking of emitters in an external cavity on their rear facet, and their coherent combination on the front facet. Two high-brightness high-power tapered laser diodes are coherently combined using a Michelson-based cavity. The combining efficiency is above 80% and results in an output power of 6.5 W in a nearly diffraction-limited beam.

HAL (Le Centre pour la Communication Scientifique Directe), Sep 21, 2011

ABSTRACT An external cavity with a binary phase grating has been developed to achieve the coheren... more ABSTRACT An external cavity with a binary phase grating has been developed to achieve the coherent beam addition of five quantum-cascade lasers emitting at 4.65 μm. The combining of these five emitters is achieved by a binary phase grating or Dammann grating able to separate an incident beam into five beams of equal intensities with a 75% efficiency. A CW output power of ~ 0.5 W corresponding to a combining efficiency of 66% with a good beam quality is obtained. More results concerning output power, combining, efficiency stability and beam quality and spectrum are exposed.

Improved diode laser beam combining techniques are in strong demand for applications in material ... more Improved diode laser beam combining techniques are in strong demand for applications in material processing. Coherent beam combining (CBC) is the only combining approach that has the potential to maintain or even improve all laser properties, and thus has high potential for future systems. As part of our ongoing studies into CBC of diode lasers, we present recent progress in the coherent superposition of high-power single-pass tapered laser amplifiers. The amplifiers are seeded by a DFB laser at λ = 976 nm, where the seed is injected into a laterally single-mode ridge-waveguide input section. The phase pistons on each beam are actively controlled by varying the current in the ridge section of each amplifier, using a sequential hill-climbing algorithm, resulting in a combined beam with power fluctuations of below 1%. The currents into the tapered sections of the amplifiers are separately controlled, and remain constant. In contrast to our previous studies, we favour a limited number of individual high-power amplifiers, in order to preserve a high extracted power per emitter in a simple, low-loss coupling arrangement. Specifically, a multi-arm interferometer architecture with only three devices is used, constructed using 6 mm-long tapered amplifiers, mounted junction up on C-mounts, to allow separate contact to single mode and amplifier sections. A maximum coherently combined power of 12.9 W is demonstrated in a nearly diffraction-limited beam, corresponding to a 65% combining efficiency, with power mainly limited by the intrinsic beam quality of the amplifiers. Further increased combined power is currently sought.

Optical and Quantum Electronics, Jan 8, 2008

This work reports on an optically-pumped vertical external-cavity surfaceemitting laser (VECSEL) ... more This work reports on an optically-pumped vertical external-cavity surfaceemitting laser (VECSEL) emitting around 852 nm for Cesium atomic clocks experiments. We describe in the following our first results on the design and the characterization of a VECSEL's semiconductor structure suitable for these applications. We optimized the parameters of the structure in order to have a low threshold and a high gain structure emitting around 852 nm. With a compact setup, we obtained a 5-mW single frequency emission exhibiting broad and fine tunability around the Cesium D 2 line.

HAL (Le Centre pour la Communication Scientifique Directe), Jul 4, 2016

ABSTRACT Diode-pumped vertical-external-cavity surface-emitting lasers (VECSELs) have already dem... more ABSTRACT Diode-pumped vertical-external-cavity surface-emitting lasers (VECSELs) have already demonstrated high power, circular diffraction-limited output beams and single-frequency laser emission [1-2]. They appear then to be an interesting way to achieve compact and efficient sources for atomic clocks. We describe in the following our very first results obtained from a compact tunable VECSEL emitting at 852.14 nm on the cesium D2 line.

HAL (Le Centre pour la Communication Scientifique Directe), Oct 10, 2021