HgCdTe探测器在激光辐照下的温度场模拟

 当强激光辐照光电探测器时，热效应是最主要的破坏机制。探测器表面吸收激光能量导致表面温度升高。温度升高到一定程度，探测器处于非正常工作状态，输出信号失真，不能准确探测信号。而探测器的温度场分布与探测结构和材料的物理性质有很大关系。为研究探测器内部的温度场分布，本文建立了热传导模型，利用Matlab软件数值模拟了激光辐照下探测器内HgCdTe光敏元的温度场分布，并对特定外界环境条件下，激光损伤阈值与胶层的厚度和热导率的关系进行分析，研究结果对探测器激光损伤效应提供有效的理论依据，同时也有助于研究HgCdTe探测器的激光防护性能。

Simulation of Temperature Field of HgCdTe Detector with Laser Radiation

Photoelectrical detectors are widely used in many fields such as satellites, missiles, remote sensing and so on, both in civil and military applications and play a major role in social security and economic development. When the detector is irradiated by high power laser, the thermal effect is the major cause of damage. The laser energy absorbed by the detector raises temperature on the surface of the detector. When the temperature goes beyond the normal temperature range, the detector will not work normally and gives wrong output signals. The temperature distribution is related with the detector structure and the material's physical properties. In order to obtain the temperature distribution in the detector, a heat conduction model is established. Using the Matlab software, the simulation is carried out for the temperature distribution in HgCdTe detector with laser radiation and the relationship between the heat conductive coefficient, the thickness of glue and the laser damage threshold under specific external environment conditions is obtained. The results can provide some guidance for the data analysis of detectors and the detector's laser proof design.