Tiled aperture coherent beam combination of 2 μm fiber lasers

Clément Romano; Dieter Panitzek; Gabriel Pradat-Peyre; Simon Milcent; Jashaani Uthayakumar; Marc Eichhorn; Christelle Kieleck

doi:10.1117/12.3001690

13 March 2024 Tiled aperture coherent beam combination of 2 μm fiber lasers

Clément Romano, Dieter Panitzek, Gabriel Pradat-Peyre, Simon Milcent, Jashaani Uthayakumar, Marc Eichhorn, Christelle Kieleck

Author Affiliations +

Proceedings Volume PC12865, Fiber Lasers XXI: Technology and Systems; PC128650S (2024) https://doi.org/10.1117/12.3001690
Event: SPIE LASE, 2024, San Francisco, California, United States

Conference Poster

Abstract

Exceeding the multi-kW power level with thulium-doped fiber lasers has not been achieved using a single thulium-doped fiber laser. One solution to overcome this limit is the coherent beam combination. We focus on an active phase control with tiled aperture configuration. The setup consists in an amplified seed laser split in three channels. These channels are controlled in phase and amplified again before being launched free space and combined. A SPGD algorithm controls the channel’s phase to provide combination. Rise time below 0.5 ms were achieved with a residual amplitude noise lower than λ/30.

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Clément Romano, Dieter Panitzek, Gabriel Pradat-Peyre, Simon Milcent, Jashaani Uthayakumar, Marc Eichhorn, and Christelle Kieleck "Tiled aperture coherent beam combination of 2 μm fiber lasers", Proc. SPIE PC12865, Fiber Lasers XXI: Technology and Systems, PC128650S (13 March 2024); https://doi.org/10.1117/12.3001690

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