12 January 2018 High-power, narrow linewidth single-frequency fiber laser at 2 μm
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We demonstrated an all-fiber single-frequency DBR master oscillator and power amplifier at 1992.6 nm. The maximum output power of the fiber amplifier was 100 W with a slope efficiency of 53% and the optical signal-to-noise ratio was about 50dB. The linewidth was less than 66 kHz and the beam quality factor M2 was 1.22 at the maximum output power. The RINs of the seed and the power amplifier were measured to be -120 dB/Hz and -102 dB/Hz at the relaxation oscillation frequency, respectively.
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Shuxian Qi, Shuxian Qi, Yubin Hou, Yubin Hou, Qian Zhang, Qian Zhang, Pu Wang, Pu Wang, } "High-power, narrow linewidth single-frequency fiber laser at 2 μm", Proc. SPIE 10619, 2017 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications, 1061907 (12 January 2018); doi: 10.1117/12.2295108; https://doi.org/10.1117/12.2295108

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