毫秒激光辐照硅光电探测器的损伤与研究.pdf

THE RESEARCH ON DAMAGE OF SILICON PHOTOELECTRIC DETECTOR IRRADIATED By MILLISECOND LASER 学位授予单位搜代码:照查堡王盔堂f!Q!竖! 学科专业名称及代码:趟堂!QZQZQl 研究方向:堂趟塑堡生堑型邀盘丛申请学位级别:亟± 指导教师:篮矗塑研究生:旦!噬论文起止时间:婴!Q:生兰Ql!:l! 长春理工大学学位论文版权使用授权书本学位论文作者及指导教师完全了解“长春理工大学硕士、博士学位论文版权使用规定”-同意长春理工大学保留并向中国科学信息研究所、中国优秀博硕士学位论 KI系列数据库及其它国家有关部门或机构送交学位论立的复印件和电子版,允许论文被查阅和借阅。本人授权长春理工大学可以将本学位论文的全都或部分内容编入有关数据库进行检索,也可采用影印、缩印或扫描等复制手段保存和汇编学位论文。作者签名:旦堡喹垫研三月丑R 导师签名爿酶。tf癖j月皿n 摘要光电探测器在医疗、工业等许多领域有若广泛的应用。当光电探测器在接收光信号时,容易受到强激光信号的干扰和破坏。探测器被激光损伤后,表现为噪声增加, 性能下降。本文从理论和实验两个方面对毫秒撒光辐照PIN光电探测器的损伤机理进行了研究。论文先介绍了光电探测器的工作原理,然后概述了激光辑照探测器的损伤机理、激光辐照探测器损伤闽值的常用判定方法及影响损伤闽值的因素。通过实验测量了毫秒激光辐照探测器的损伤阈值。实验结果显示,ms激光辐照光 。。从模拟图像上可以看出,在激光辐照靶材平面上,光斑中心处的温度最高,随着半径的增加,激光辐照的靶材表面的温度垤渐下降,不是均匀分布的。随着辐照时间的增加,表面温度逐渐增加。这些研究工作对深入分析激光对光电探测器损伤机理,提高探测器抗檄光损伤能力有一定借鉴的意义。关键词:光电探测器激光辐照损伤闻值 ABSTRACT The photoelectric detector has awideapplication forinstance,in medical treatment, inindustries and etc wh”receiving photo signal,the photoeleetrie detectoTis谢b disturbed and damaged bythe higll-energylaser signal Al’erdamaging causedbylaser’the noise ofphotoelectric detector itsperformance willgo bad The damage mechanism ofPIN photoelectric detector caused by millisecond laserirredimiag is researched by two parts-theory and experiment The working principle ofphotoelectric detector isintroduced atfirstinthispapeL Moreover'its damage mechanism,judgment method ofdamage threshold and theinfluence factorsofdamage threshold are researched The damage threshold ofsiliconphotoelectric detectorirradiatedby millisecond laser measured inexDeriment As 2563J/cm2 The temperature variation Orltheface ofcircular target irradiated by millisecond laser issimulated,and thedistributionoftemperature isanalyzed As can be seer from thefigure, thetemperature inthe center ofbeam on target ishighest Asradius getsbigge r,the surface temperature irradiatedby millisecond laserwillgo down,the distribution is not equal As irradiati