Small footprint phase locking system for large tiled aperture laser array
| Autor: | Boju, A, Maulion, G, Saucourt, J, Leval, J, Ledortz, J, Koudoro, A, Berthomier, J-M, Naiim-Habib, M, Armand, P, Kermène, Vincent, Desfarges-Berthelemot, A, Barthelemy, A |
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| Přispěvatelé: | Institut de Recherche en Communications Optiques et Microondes (IRCOM), Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Optics Express Optics Express, Optical Society of America-OSA Publishing, 2021 |
| ISSN: | 1094-4087 |
| Popis: | International audience; A phase sensing system fitted to the control of coherent laser beam array of large cross section is experimented. It is based on the use of a fiber bundle that collects a weak part of the synthetic wavefront, that scales it down (1/40) and that reshapes it in a more compact arrangement (2D to 1D array). Then, the reconfigured beam array can be analyzed by a small footprint system making the large laser beam array easier to phase-lock. The discrete laser array wavefront transmitted by the meter long fiber bundle was stabilized thanks to a multiple arm servo loop. Laser array phase locking was further ensured by random scattering through a diffuser, associated to an alternating projection algorithm. Six fiber laser beams constituting a 110 mm diameter synthetic aperture, were phase-locked with lambda/16 accuracy. |
| Databáze: | OpenAIRE |
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