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SBS suppression in high brightness, all-fiberized and linearly polarized amplifiers by rectangular spectrum
Author(s): Daren Meng; Pengfei Ma; Xubao He; Wenchang Lai; Rongtao Su; Yanxing Ma; Pu Zhou; Lijia Yang
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Paper Abstract

Stimulated Brillouin scattering (SBS) suppression in high power, narrow linewidth and all polarization-maintained amplifiers with near diffraction limited (NDL) beam quality by rectangular optical spectrum is demonstrated. Rectangular spectrum is generated by using cascaded phase modulations. In the preliminary experiment, output power of 509 W with spectral linewidth of ~ 3 GHz is obtained. At maximal output power, the polarization extinction ratio (PER) is measured to be ~ 14 dB and the beam quality (M2 factor) is M2 ~1.2. The technique presented give useful reference to control the spectral linewidth in high brightness fiber amplifiers. By combining with other linewidth controlling techniques, several kilowatt-level output power with spectral linewidth of < 10 GHz could be expected.

Paper Details

Date Published: 29 March 2019
PDF: 5 pages
Proc. SPIE 11046, Fifth International Symposium on Laser Interaction with Matter, 1104605 (29 March 2019); doi: 10.1117/12.2523633
Show Author Affiliations
Daren Meng, Nanjing Univ. of Science and Technology (China)
State Key Lab. of Pulsed Power Lab Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Pengfei Ma, National Univ. of Defense Technology (China)
State Key Lab. of Pulsed Power Lab Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Xubao He, Nanjing Univ. of Science and Technology (China)
Wenchang Lai, National Univ. of Defense Technology (China)
Rongtao Su, National Univ. of Defense Technology (China)
State Key Lab. of Pulsed Power Lab Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Yanxing Ma, National Univ. of Defense Technology (China)
State Key Lab. of Pulsed Power Lab Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Pu Zhou, National Univ. of Defense Technology (China)
State Key Lab. of Pulsed Power Lab Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Lijia Yang, National Univ. of Defense Technology (China)
State Key Lab. of Pulsed Power Lab Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)


Published in SPIE Proceedings Vol. 11046:
Fifth International Symposium on Laser Interaction with Matter
YiJun Zhao, Editor(s)

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