9 November 2016 High power far-infrared optical parametric oscillator with high beam quality
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A high power ZnGeP2 (ZGP) optical parametric oscillator (OPO) with good beam quality pumped by a Q-switched Ho:YAG laser was demonstrated. The maximum output power of the ZGP OPO with a four-mirror ring cavity was about 5.04 W around 8.1 μm with 83.9 W Ho incident pump power, corresponding to a slope efficiency of 9.2 %. The ZGP OPO produced 36.0 ns far-IR pulse laser in the 8.0-8.3 μm spectral regions. The beam quality was measured to be M2~1.6 at the highest output power.
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Chuan-Peng Qian, Ying-Jie Shen, Tong-Yu Dai, Xiao-Ming Duan, Bao-Quan Yao, "High power far-infrared optical parametric oscillator with high beam quality", Proc. SPIE 10016, High-Power Lasers and Applications VIII, 100160G (9 November 2016); doi: 10.1117/12.2246001; https://doi.org/10.1117/12.2246001


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