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6.2 W single-longitudinal-mode 2-μm double-pass Ho:YAG MOPA laser with dual crystals

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Abstract

A high-power single-longitudinal-mode Ho:YAG laser operating at 2090.8 nm was demonstrated by using a dual-crystal, double-pass MOPA architecture. 6.2 W single-longitudinal-mode laser was extracted from the amplifier at the pump power of 22 W combined with around 23 mW injected seed laser, corresponding to an optical-to-optical efficiency of 28.2 % and a slope efficiency of 36.2 % for the double-pass Ho:YAG MOPA laser system. The maximum small-signal gain of 26.2 dB was obtained with around 10 mW input seed laser. The beam quality factor was measured as M2 ~ 1.27.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (No. 61308009, No. 61405047), China Postdoctoral Science Foundation funded project (No. 2013M540288, No. 2015M570290), Fundamental Research funds for the Central Universities Grant (No. HIT.NSRIF.2014044, No. HIT. NSRIF.2015042) and Science Fund for Outstanding Youths of Heilongjiang Province (JQ201310), Heilongjiang Postdoctoral Science Foundation Funded Project (LBH-Z14085).

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  1. National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin, 15001, China

    Tong-Yu Dai, Jing Wu, You-Lun Ju, Bao-Quan Yao, Hong-Yu Yang, Xiao-Ming Duan, Ying-Jie Shen & Yue-Zhu Wang

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  1. Tong-Yu Dai
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  2. Jing Wu
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  8. Yue-Zhu Wang
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Correspondence to You-Lun Ju.

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Dai, TY., Wu, J., Ju, YL. et al. 6.2 W single-longitudinal-mode 2-μm double-pass Ho:YAG MOPA laser with dual crystals. Appl. Phys. B 121, 141–145 (2015). https://doi.org/10.1007/s00340-015-6211-0

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