System design for a >1 kW in-band pumped thulium-doped fiber amplifier (Conference Presentation)

Alex Sincore; Justin Cook; Dong Jin Shin; Patrick Roumayah; Nathan Bodnar; Martin Richardson

doi:10.1117/12.2513435

13 March 2019 System design for a >1 kW in-band pumped thulium-doped fiber amplifier (Conference Presentation)

Alex Sincore, Justin Cook, Dong Jin Shin, Patrick Roumayah, Nathan Bodnar, Martin Richardson

Proceedings Volume 10897, Fiber Lasers XVI: Technology and Systems; 108970M (2019) https://doi.org/10.1117/12.2513435
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

High power thulium-doped fibers rely on 793 nm pumping and cross-relaxation. While this approach has been historically successful, low optical-to-optical efficiencies and high thermal loads impede multi-kW power scaling. Another option is to in-band pump the final amplifier. In-band pumped thulium-doped fibers enable >80% efficiencies and low thermal loads. Design concepts and simulations for scaling thulium-doped fibers >1 kW with in-band pumping are discussed. Developing the high power 1.9 µm pump units, the incoherent fiber combiner, and the specially designed final amplifier are detailed. Requirements on the seed source (wavelength, power, etc.) are also described.

Conference Presentation

Citation Download Citation

Alex Sincore, Justin Cook, Dong Jin Shin, Patrick Roumayah, Nathan Bodnar, and Martin Richardson "System design for a >1 kW in-band pumped thulium-doped fiber amplifier (Conference Presentation)", Proc. SPIE 10897, Fiber Lasers XVI: Technology and Systems, 108970M (13 March 2019); https://doi.org/10.1117/12.2513435

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