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根据红外探测器的结构特点和传热学理论,研究激光干扰机的激光器对探测器的损伤效果。以InSb探测器为例,设定入射激光从顶层辐照,结合各层之间热传导效应建立分层热模型。考虑激光在空间上的分布为高斯分布,给定初值和边界条件,利用Matlab偏微分工具箱进行建模仿真。重点研究了辐照距离、辐照时间和激光器功率等因素对探测器损伤效果的影响,给出了相应的仿真结果。当连续激光功率为50 W、距离为200 m、辐照时间为3 s时,对探测器的损伤效果主要是软损伤,受激光功率密度所限,未能造成永久性破坏。
According to the structural characteristics of infrared detectors and heat transfer theory, laser jammer laser damage effect on the detector. Taking InSb detector as an example, the incident laser beam is set to irradiate from the top layer and a layered thermal model is established based on the heat conduction effect among the layers. Considering the spatial distribution of the laser as a Gaussian distribution, given the initial value and the boundary conditions, the Matlab partial differential toolbox is used for modeling and simulation. Focus on the irradiation distance, irradiation time and laser power and other factors on the detector damage effect, gives the corresponding simulation results. When the continuous laser power is 50 W, the distance is 200 m, and the irradiation time is 3 s, the damage to the detector is mainly soft damage, which is limited by the laser power density and can not cause permanent damage.