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Kilowatt-level, high brightness, narrow-linewidth PM fiber amplifiers based on laser gain competition
Author(s): Daren Meng; Pengfei Ma; Xiaolin Wang; Yanxing Ma; Rongtao Su; Pu Zhou; Lijia Yang
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Paper Abstract

Stimulated Brillouin scattering (SBS) management in kilowatt level, high brightness, narrow spectral width, and all polarization-maintained amplifiers by using laser gain competition is demonstrated. This method can increase the SBS threshold of the fiber amplifier by more than twice without changing the linewidth. By further incorporating phase modulation technique, the SBS threshold is scaled to be as high as 32.4 times compared with single frequency amplification. Output power of 1082 W is achieved with polarization extinction ratio (PER) of ~ 14 dB, linewidth of <7.6 GHz and beam quality (M2 factor) of ~M2 =1.14 in a preliminary validation experiment. This kind of fiber source has great potential in the applications of high power coherent beam combining (CBC) or spectral beam combining (SBC) systems.

Paper Details

Date Published: 12 March 2019
PDF: 6 pages
Proc. SPIE 11023, Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 110233B (12 March 2019); doi: 10.1117/12.2517299
Show Author Affiliations
Daren Meng, National Univ. of Defense Technology (China)
Pengfei Ma, National Univ. of Defense Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Xiaolin Wang, National Univ. of Defense Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Yanxing Ma, National Univ. of Defense Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Rongtao Su, National Univ. of Defense Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Pu Zhou, National Univ. of Defense Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Lijia Yang, National Univ. of Defense Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)


Published in SPIE Proceedings Vol. 11023:
Fifth Symposium on Novel Optoelectronic Detection Technology and Application
Qifeng Yu; Wei Huang; You He, Editor(s)

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