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System design for a >1 kW in-band pumped thulium-doped fiber amplifier (Conference Presentation)
Author(s): Alex Sincore; Justin Cook; Dong Jin Shin; Patrick Roumayah; Nathan Bodnar; Martin Richardson
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Paper 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.

Paper Details

Date Published: 13 March 2019
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Proc. SPIE 10897, Fiber Lasers XVI: Technology and Systems, 108970M (13 March 2019); doi: 10.1117/12.2513435
Show Author Affiliations
Alex Sincore, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Justin Cook, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Dong Jin Shin, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Patrick Roumayah, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Nathan Bodnar, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Martin Richardson, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)


Published in SPIE Proceedings Vol. 10897:
Fiber Lasers XVI: Technology and Systems
Adrian L. Carter; Liang Dong, Editor(s)

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