基于光参量振荡器的重频人眼安全激光器技术研究

 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 1.064 μm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。

Eye-safe repetition laser based on optical parametric oscillator

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 xeno-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.