Single-pass tapered semiconductor optical amplifiers and modules for efficient coherent beam combining

P. Crump; G. Blume; D. Feise; M. Elattar; A. Ginolas; J. Fricke; A. Maaβdorf; G. Tränkle; K. Paschke; P. Albrodt; J. Hamperl; P. Georges; G. Lucas-Leclin

doi:10.1117/12.2578512

5 March 2021 Single-pass tapered semiconductor optical amplifiers and modules for efficient coherent beam combining

P. Crump, G. Blume, D. Feise, M. Elattar, A. Ginolas, J. Fricke, A. Maaβdorf, G. Tränkle, K. Paschke, P. Albrodt, J. Hamperl, P. Georges, G. Lucas-Leclin

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Proceedings Volume 11705, Novel In-Plane Semiconductor Lasers XX; 117050M (2021) https://doi.org/10.1117/12.2578512
Event: SPIE OPTO, 2021, Online Only

Abstract

We present progress in high power GaAs-based single-pass semiconductor tapered optical amplifiers and modules tailored for coherent beam combining (CBC) in master-oscillator power-amplifier configuration. Amplifier design is first studied, by varying device geometry and epitaxial structure in 976nm devices. Epitaxial structures with large vertical near field and low wave-guiding from the active region enable higher CBC efficiency. However, changes to in-plane geometry did not improve performance. Overall, CBC of tapered amplifiers is stable, reproducible and robust, motivating next the development of 1064nm CBC-ready stand-alone sub-modules. Design, construction and test results from the pilot-series fabrication of these amplifier modules are presented.

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P. Crump, G. Blume, D. Feise, M. Elattar, A. Ginolas, J. Fricke, A. Maaβdorf, G. Tränkle, K. Paschke, P. Albrodt, J. Hamperl, P. Georges, and G. Lucas-Leclin "Single-pass tapered semiconductor optical amplifiers and modules for efficient coherent beam combining", Proc. SPIE 11705, Novel In-Plane Semiconductor Lasers XX, 117050M (5 March 2021); https://doi.org/10.1117/12.2578512

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