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23 October 2023 Filled aperture coherent beam combining using multi-plane light conversion and microcontroller-based hill climbing
Clément Jacquard, Claire Autebert, Pierre Vernaz-Gris, Tangi Le Guennic, Julien Bayol, Pu Jian, Guillaume Labroille
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Proceedings Volume PC12739, High Power Lasers: Technology and Systems, Platforms, Effects VI; PC1273904 (2023) https://doi.org/10.1117/12.2680765
Event: SPIE Security + Defence, 2023, Amsterdam, Netherlands
Abstract
Coherent combination of laser beams is crucial for high-power laser development in various applications, including defense and communication systems. A filled-aperture coherent beam combiner is introduced, which includes polarization-maintaining fiber components, Electro-Optic Modulators, EDFA, a Multi-Plane Light Converter, and a feedback loop based on the Stochastic Parallel Gradient Descent algorithm. The SPGD algorithm allows precise control of the EOMs to achieve stable optical output power. The experimental results demonstrate the proposed approach achieves coherent combination of up to 6 input channels with high efficiency, negligible power loss duration, and precise control over thermal and mechanical perturbations. This technology is directly scalable for different wavelengths.
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Clément Jacquard, Claire Autebert, Pierre Vernaz-Gris, Tangi Le Guennic, Julien Bayol, Pu Jian, and Guillaume Labroille "Filled aperture coherent beam combining using multi-plane light conversion and microcontroller-based hill climbing", Proc. SPIE PC12739, High Power Lasers: Technology and Systems, Platforms, Effects VI, PC1273904 (23 October 2023); https://doi.org/10.1117/12.2680765
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KEYWORDS
Beam combiners
Electrooptic modulation
Feedback loops
High power lasers
Laser development
Telecommunications
Mechanical efficiency
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