大功率激光对CCD探测器损伤研究  

Research on high-power laser damage to CCD detectors

作　　者：程相正 邵铭[1,2] 曲卫东 邵俊峰[3] 李武周 范瑜[1,2] CHENG Xiang-zheng;SHAO Ming;QU Wei-dong;SHAO Jun-feng;LI Wu-zhou;FAN Yu(Unit 63891 of the PLA,Luoyang 471003,China;Key Laboratory of Electro-Optical Countermeasures Text&Evaluation Technology,Luoyang 471003,China;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]中国人民解放军63891部队,河南洛阳471003 [2]光电对抗测试评估技术重点实验室,河南洛阳471003 [3]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《激光与红外》2023年第11期1743-1749,共7页Laser & Infrared

基　　金：试验技术研究重点项目(No.2200110033);重点实验室开放课题基金项目(No.GKCP2020004)资助。

摘　　要：针对大功率激光辐照可见光成像探测器损伤机理,开展了1080 nm波段大功率连续激光对CCD探测器损伤模型仿真与实验研究。首先,基于CCD典型结构及各层材料特性,建立了连续激光对CCD探测器热效应损伤模型,仿真模拟了CCD各层瞬态温度场和应力场,分析了连续激光损伤CCD多层结构的时间演化规律;其次,开展了连续激光对CCD探测器损伤实验,获取了CCD损伤阈值,并利用金相显微镜、扫描电镜对CCD探测器各层熔融情况进行了分析;最后,对模型仿真与损伤实验结果进行了对比,并分析了损伤阈值存在差异的原因。结果表明,1080 nm连续激光辐照可见光CCD探测器400 ms时的仿真损伤阈值为1.45×10^(6)W/cm^(2),实验损伤阈值2.13×10^(6)W/cm^(2),误差约为31.9%。仿真与实验结果对探究大功率激光辐照CCD探测器损伤机理、评估干扰效果具有一定的参考意义。Aiming at the damage mechanism of visible light imaging detector irradiated by high-power tactical laser,the damage simulation and experimental study on CCD detector by high-power continuous laser at 1080 nm band are carried out.Firstly,based on the typical structure of CCD and the material characteristics of each layer,the thermal damage model of CCD detector caused by continuous laser is established.The transient temperature field and stress field of each layer of CCD are simulated,and the time evolution law of continuous laser damage to CCD multilayer structure is analyzed.Secondly,the damage experiment of CCD detector by continuous laser is carried out to obtain the CCD damage threshold,and the melting of each layer of the CCD detector is analyzed by metallographic microscope and scanning electron microscope.Finally,the results of model simulation and damage experiment are compared,and the reasons for the difference in damage thresholds are analyzed.The results show that the simulated damage threshold of visible CCD detector irradiated by 1080 nm continuous laser for 400 ms is 1.45×10^(6)W/cm^(2),and the experimental damage threshold is 2.13×10^(6)W/cm^(2),with an error of about 31.9%.The simulation and experimental results have certain reference significance for exploring the damage mechanism of CCD detectors irradiated by high-power laser and evaluating the interference effect.

关 键 词：大功率连续激光 CCD 损伤 模型仿真 实验 

分 类 号：TN249[电子电信—物理电子学] TN977