参照国际标准ISO 21254及其规范，组建了一套2 μm 波长脉冲激光损伤阈值测试装置，利用该实验装置并采用R-on-1的测试方法，测量了不同表面光学质量红外非线性晶体磷锗锌的表面激光损伤阈值，同时测量并分析了激光脉冲频率、脉冲宽度等参数对磷锗锌晶体激光损伤阈值的影响，通过测试对该晶体在实际使用中避免激光损伤提供了重要的实验参考。

A 2 μm pulsed laser damage threshold testing apparatus is set up according to the international standard ISO 21254, the surface laser damage threshold of infrared nonlinear optical crystal ZnGeP2 with different surface quality are measured, meanwhile, the influence of different laser parameters, such as pulse frequency, pulse width, etc, on the surface laser damage threshold testing results are analyzed. These testing results provide an important experimental reference to avoid laser damage to ZnGeP2 in practical use.