SBS suppression in high brightness, all-fiberized and linearly polarized amplifiers by rectangular spectrum

Daren Meng; Pengfei Ma; Xubao He; Wenchang Lai; Rongtao Su; Yanxing Ma; Pu Zhou; Lijia Yang

doi:10.1117/12.2523633

29 March 2019 SBS suppression in high brightness, all-fiberized and linearly polarized amplifiers by rectangular spectrum

Daren Meng, Pengfei Ma, Xubao He, Wenchang Lai, Rongtao Su, Yanxing Ma, Pu Zhou, Lijia Yang

Author Affiliations +

Proceedings Volume 11046, Fifth International Symposium on Laser Interaction with Matter; 1104605 (2019) https://doi.org/10.1117/12.2523633
Event: Fifth International Symposium on Laser Interaction with Matter, 2018, Changsha, China

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.

Citation Download Citation

Daren Meng, Pengfei Ma, Xubao He, Wenchang Lai, Rongtao Su, Yanxing Ma, Pu Zhou, and Lijia Yang "SBS suppression in high brightness, all-fiberized and linearly polarized amplifiers by rectangular spectrum", Proc. SPIE 11046, Fifth International Symposium on Laser Interaction with Matter, 1104605 (29 March 2019); https://doi.org/10.1117/12.2523633

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