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本文叙述了锗－硫化铅（Ｇｅ－ＰｂＳ）探测器的基本特性。分析了激光辐射锗滤光片使用材料升温的穿透深度随时间的变化。在光斑面积２．４６ｍｍ×３．６９ｍｍ和辐照时间０．８ｓ的条件下，得到连续氧碘激光（ＣＷ－ＣＯＩＬ）辐照锗滤光片的烧蚀阈值为１２４Ｗ和破裂阈值为１７７Ｗ的实验数据。在此基础上，进行了ＣＷ－ＣＯＩＬ辐照Ｇｅ－ＰｂＳ探测器的热效应研究，在光斑直径２．１ｍｍ和辐照时间０．８ｓ的条件下，给出ＣＷ－ＣＯＩＬ使Ｇｅ－ＰｂＳ探测器致盲的阈值为１７Ｗ、永久失效的阈值为１９８Ｗ的实验结果。研究结果表明：ＣＷ－ＣＯＩＬ辐照Ｇｅ－ＰｂＳ探测器的破坏机理是激光加热和热应力联合作用的结果。锗滤光片升温，造成硫化铅探测器环境温度升高，导致其探测灵敏度下降为零是ＣＷ－ＣＯＩＬ辐照Ｇｅ－ＰｂＳ探测器产生致盲的原因。激光辐照功率越高，Ｇｅ－ＰｂＳ探测器致盲、恢复时间就越长，甚至造成永久性的失效。
This article describes the basic characteristics of germanium-lead sulfide (Ge-PbS) detectors. The penetration depth of the material used for laser irradiation of germanium filter is analyzed with time. Under the conditions of a spot area of 2.46 mm × 3.69 mm and an irradiation time of 0.8 s, an ablation threshold value of 124 W and a rupture threshold value of 177 W for a continuous oxy-iodine laser (CW-COIL) irradiated germanium filter were obtained data. On this basis, the thermal effect of Ge-PbS detector irradiated by CW-COIL was studied. Under the condition of spot diameter 2.1mm and irradiation time 0.8s, Blind threshold is 17W, the threshold of permanent failure is 198W. The results show that the failure mechanism of CW-COIL irradiated Ge-PbS detector is the result of the combination of laser heating and thermal stress. The temperature rise of the germanium filter caused the ambient temperature of the lead sulfide detector to rise, causing its detection sensitivity to decrease to zero, which is the cause of blindness in the CW-COIL irradiated Ge-PbS detector. The higher the laser power, the more the Ge-PbS detector is blinded, the longer the recovery time will be, resulting in a permanent failure.