Liu Gao-You, Chen Yi, Yao Bao-Quan, Wang Rui-Xue, Yang Ke, Yang Chao, Mi Shu-Yi, Dai Tong-Yu, Duan Xiao-Ming
Opt Lett. 2020 Apr 15;45(8):2347-2350. doi: 10.1364/OL.389603.
We demonstrated a high-power long-wave infrared optical parametric oscillator at 9.8 µm based on a type-I phase-matching ${{\rm ZnGeP}_2}$ZnGeP crystal. By using a ${Q}$Q-switched 2091 nm Ho:YAG laser with pulse repetition frequency of 10 kHz as the pump source, the maximum average output power of 3.51 W at 9.8 µm was achieved with incident pump power of 90 W, corresponding to a slope efficiency of 4.81% and conversion efficiency at maximum pump power of 3.9%. The pulse width of 19.6 ns and linewidth of 142 nm were obtained at maximum output level. In addition, the beam quality factor ${M^2}$M was measured to be ${\sim}{2.2}$∼2.2.
我们展示了一种基于I型相位匹配ZnGeP₂晶体的9.8 µm高功率长波红外光学参量振荡器。通过使用脉冲重复频率为10 kHz的调Q 2091 nm Ho:YAG激光器作为泵浦源，在90 W的入射泵浦功率下，在9.8 µm处实现了3.51 W的最大平均输出功率，对应斜率效率为4.81%，最大泵浦功率下的转换效率为3.9%。在最大输出水平下获得了19.6 ns的脉冲宽度和142 nm的线宽。此外，测量的光束质量因子M²约为2.2。
