22 February 2017 Linewidth-narrowed 2-μm single-frequency fiber laser based on stimulated Brillouin scattering effect
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Abstract
A 2-μm linear-polarized single-frequency Brillouin-Thulium fiber laser (BTFL) has been experimentally investigated for linewidth narrowing. The threshold for the Brillouin pump is around 200 mW, and more than 205 mW single-frequency Stokes laser was achieved with the 793 nm pump power of 8.5 W. The linewidth of the fiber laser has been narrowed for ~8 times, from 34 to 4.6 kHz. The measured RIN of the BTFL is <-150 dB/Hz for frequency above 2 MHz, which approaches the shot noise limit.
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Shijie Fu, Wei Shi, Haiwei Zhang, Quan Sheng, Xiaolei Bai, Jianquan Yao, "Linewidth-narrowed 2-μm single-frequency fiber laser based on stimulated Brillouin scattering effect", Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 100830L (22 February 2017); doi: 10.1117/12.2251644; https://doi.org/10.1117/12.2251644
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