2.79 μm中红外激光对PbS探测器的损伤实验研究
投稿时间:2021-01-16  修订日期:2021-03-01  点此下载全文
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王玺 国防科技大学 电子对抗学院 脉冲功率激光技术国家重点实验室 230037
叶庆 国防科技大学 电子对抗学院 脉冲功率激光技术国家重点实验室 
董骁 国防科技大学 电子对抗学院 脉冲功率激光技术国家重点实验室 
雷武虎 国防科技大学 电子对抗学院 脉冲功率激光技术国家重点实验室 
吕桐林 国防科技大学 电子对抗学院 脉冲功率激光技术国家重点实验室 
郭彦廷 国防科技大学 电子对抗学院 脉冲功率激光技术国家重点实验室 
胡以华 国防科技大学 电子对抗学院 脉冲功率激光技术国家重点实验室 230037
基金项目:国家自然科学基金面上项目(61871389)、国防科技大学校科研计划项目(ZK18-01-02)、安徽省自然科学基金面上项目(1908085MF222)
中文摘要:开展了不同重频下2.79 μm中红外激光对PbS探测器的损伤实验。基于传热学理论,利用有限元法对2.79 μm中红外激光辐照PbS探测器中的温度分布进行了数值分析,并比较了脉冲数目、重复频率对损伤效果的影响,分析了2.79 μm中红外激光辐照PbS探测器的损伤机理,获取了相关阈值数据。研究表明,2.79 μm中红外激光对PbS探测器的损伤机理主要以热熔融为主,在温度没有达到PbS熔点时,PbS就会发生热分解反应,析出黄色沉淀物PbO;计算得到单脉冲2.79 μm中红外激光对PbS探测器的损伤阈值为13.03 J/cm2,且脉冲数目、重复频率对损伤效果影响很大,损伤累积效应明显。理论模型能够较好地解释PbS表面初始损伤形貌特征。
中文关键词:激光损伤  数值分析  2.79 μm中红外激光  PbS探测器
 
Experimental study of PbS detector irradiated by 2.79 μm mid-infrared laser
Abstract:It has very important application value to investigate the damage performance of PbS detector irradiated by mid-infrared laser. In this paper, the experiment research on damage in PbS detector irradiated by 2.79 μm mid-infrared laser is carried out. Furthermore, the theoretical model of PbS detector irradiated by 2.79 μm laser is developed and a numerical simulation is performed to calculate temperature distribution in PbS detector using finite element method, and the relationship between laser parameters and damage effect is also studied. The simulation and experimental results indicate that the damage mechanism of PbS detector irradiated by 2.79 μm mid-infrared laser is mainly melting damage, and the melting damage threshold is calculated to be 13.03 J/cm2. Before the temperature reaches the melting point of PbS, the thermal decomposition reaction of PbS begins, and then separates out PbO which is the yellow precipitate. It is shown that pulse repetition frequency and the number of pulses affect damage considerably, and the accumulation of multi-shot laser induced damage in PbS detector is obvious. The theoretical analysis is in agreement with the initial damage morphology of PbS surface.
keywords:laser damage,numerical analysis,2.79 μm mid-infrared laser,PbS detector
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