对KTP-OPO的相位匹配进行了理论分析和计算,并绘制了角度调谐曲线.基于光参量振荡器,选用KTP非线性晶体,在1.57μm人眼安全激光波段进行了实验研究.将脉冲氙灯侧面泵浦Nd:YAG 1.064μm激光应用于腔内KTP-OPO设计中,在工作频率5 Hz时,输出激光能量32 mJ,脉冲宽度7.22 ns,光-光转换效率为41%.这一结果使重频远距离人眼安全激光测距成为可能.%The phase-matching mode of KTP-OPO was theoretically analyzed and calculated, and the angle-tuning curve of KTP-OPO was given. A 1. 57 μm eye-safe laser based on optical parametric oscillator was experimentally studied, which adopted KTP nonlinear optical crystal. Using a xenon-flash-lamp-pumped 1. 064 μm Nd∶YAG laser in intracavity KTP-OPO, under the repetition rate of 5 Hz, a laser output with the energy of 32 mJ and the pulse width of 7. 22 ns was obtained. The optical-to-optical conversion efficiency was 41％, which makes long range laser range finding possible.
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