1.1 kW, beam-combinable thulium doped all-fiber amplifier

Brian M. Anderson; Joel Solomon; Angel Flores

doi:10.1117/12.2576209

5 March 2021 1.1 kW, beam-combinable thulium doped all-fiber amplifier

Brian M. Anderson, Joel Solomon, Angel Flores

Proceedings Volume 11665, Fiber Lasers XVIII: Technology and Systems; 116650B (2021) https://doi.org/10.1117/12.2576209
Event: SPIE LASE, 2021, Online Only

Abstract

A 1.1 kW CW fiber amplifier emitting at 1.95µm and phase modulated at 5 GHz, with 51% optical conversion efficiency and near diffraction limited beam quality (M2<1.1) is demonstrated. The fiber amplifier consists of 9m of active 20/400um thulium doped fiber, and 2m of passive delivery fiber. Several limiting nonlinearities critical to maintaining coherence were analyzed, including stimulated Brillouin Scattering and modulation instability. To our knowledge, this is the first kw-class thulium doped fiber amplifier operating with narrow linewidth.

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Citation Download Citation

Brian M. Anderson, Joel Solomon, and Angel Flores "1.1 kW, beam-combinable thulium doped all-fiber amplifier", Proc. SPIE 11665, Fiber Lasers XVIII: Technology and Systems, 116650B (5 March 2021); https://doi.org/10.1117/12.2576209

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