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Proceedings Paper

258 W of spectrally beam combined power with near-diffraction limited beam quality
Author(s): Thomas H. Loftus; Anping Liu; Paul R. Hoffman; Alison Thomas; Marc Norsen; Charles E. Hamilton; Eric Honea
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Paper Abstract

We report on progress toward power scaling Yb fiber lasers beyond kW levels by an efficient and versatile architecture that maintains near diffraction limited beam quality. For this work, power scaling is performed at two distinct levels. The first utilizes a diffraction grating to spectrally beam combine (SBC) the output from several master-oscillator, poweramplifier (MOPA) fiber lasers with a goal of producing high quality combined beams with > 1 kW of power. The second involves scaling individual MOPA outputs to > 200 W, thereby reducing the number of lasers required for SBC. As a first step toward reaching these goals, we have developed Yb fiber MOPAs producing up to 208 W of polarized, narrow band, and near diffraction limited output and have demonstrated two-channel fiber laser SBC with a power combining efficiency of 93%, a combined beam power of 258 W, and a dispersed axis M2 of 1.06. These results represent a significant advance in high brightness, spectrally beam combined laser systems.

Paper Details

Date Published: 23 February 2006
PDF: 8 pages
Proc. SPIE 6102, Fiber Lasers III: Technology, Systems, and Applications, 61020S (23 February 2006); doi: 10.1117/12.648097
Show Author Affiliations
Thomas H. Loftus, Aculight Corp. (United States)
Anping Liu, Aculight Corp. (United States)
Paul R. Hoffman, Aculight Corp. (United States)
Alison Thomas, Aculight Corp. (United States)
Marc Norsen, Aculight Corp. (United States)
Charles E. Hamilton, Aculight Corp. (United States)
Eric Honea, Aculight Corp. (United States)

Published in SPIE Proceedings Vol. 6102:
Fiber Lasers III: Technology, Systems, and Applications
Andrew J. W. Brown; Johan Nilsson; Donald J. Harter; Andreas Tünnermann, Editor(s)

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