激光入射角度对CCD探测器损伤特性的影响  

The Effect of Laser Incidence Angle on Damage Characteristics of CCD Detector

作　　者：冯光[1] 康华超 代金芪 张银福 高勋[3] FENG Guang;KANG Huachao;DAI Jinqi;ZHANG Yinfu;GAO Xun(The 27th Research Institute of China Electronics Technology Group Corporation,Zhengzhou 450047;Key Laboratory of Electro-Optical Countermeasure Test&Evalution Technology,Luoyang 471026;School Physics,Changchun University of Science and Technology,Changchun 130022)

机构地区：[1]中国电子科技集团公司第二十七研究所,郑州450047 [2]光电对抗测试评估技术重点实验室,洛阳471026 [3]长春理工大学物理学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2023年第4期31-36,共6页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：吉林省科技厅中青年科技创新领军人才及团队项目(20200301042RQ)。

摘　　要：开展了激光入射角度对高重频纳秒激光诱导CCD探测器损伤特性研究。通过傅里叶热传导方程理论计算了CCD探测器表面的温升曲线,发现随着激光入射角度变大,激光辐照区域中心点位置的最高温度逐渐降低,且液-固相变凝固时间缩短,降低了CCD探测器的损伤可能。实验结果表明,随着入射激光功率的增加,激光诱导CCD探测器表面损伤形貌的横向尺寸和纵向尺寸都逐渐变大。随着激光入射角度变大,激光诱导CCD探测器形貌损伤面积增大,并且形貌损伤阈值增加。这是由于激光入射角度增大导致了CCD探测器表面辐照的激光光斑面积变大,使探测器表面的激光功率密度降低,从而造成CCD探测器的激光损伤阈值增大。The effects of laser incidence angle on the damage characteristics of CCD detector induced by high repetition rate nanosecond laser are studied.The temperature rise curve of CCD detector surface are calculated by Fourier heat conduction equation theory.The maximum temperature at the center point of the laser irradiation area is gradually decreasing with the increasing of laser incidence angle,and the liquid-solid transformation solidification time is shortened,which can reduce the damage possibility of the CCD detector.The experimental results show that the damage degree of CCD detector surface induced by nanosecond laser is aggravated with the increasing of laser power,and the transverse and longitudinal dimensions of the damage morphology are gradually increased.The damage area and the damage threshold of CCD detector induced by nanosecond laser are increasing with the increasing of laser incidence angle.The increasing of laser incidence angle can lead to the larger area of laser spot irradiated on the surface of CCD detector,which reduce the laser power density on the surface of detector,so the laser damage threshold of CCD detector is increasing with the increasing of laser incidence angle.

关 键 词：激光损伤 损伤阈值 入射角度 CCD探测器 

分 类 号：TN977[电子电信—信号与信息处理]