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11 March 2016 High power single-frequency erbium-ytterbium co-doped all-fiber laser in MOPA
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We report herein an all-fiber single-frequency master oscillator power amplifier (MOPA) at 1550 nm with Er/Yb-codoped active fiber and wavelength-stabilized 976-nm LD pump source. A pump-limited maximum continuous-wave output power of 56.4 W was achieved under the pump power of 150 W, with corresponding slope efficiency being 37.0%. Via the self-heterodyne method, the evolution of spectrum linewidth during the amplification was investigated for the high-power MOPA-based single-frequency fiber laser. The linewidth and relative intensity noise at the maximum output power are 4.21 kHz and −110 dBm/Hz, respectively.
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Xiaolei Bai, Quan Sheng, Wei Shi, Haiwei Zhang, and Jianquan Yao "High power single-frequency erbium-ytterbium co-doped all-fiber laser in MOPA", Proc. SPIE 9728, Fiber Lasers XIII: Technology, Systems, and Applications, 972835 (11 March 2016);

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