脉冲激光辐照CCD探测器的硬破坏效应数值模拟研究  

Numerical Simulation of Pulsed Laser Induced Damage on CCD Arrays

作　　者：姜楠[1] 张雏[1] 牛燕雄[1] 沈学举[1] 杨海林[1] 陈燕[1] 王龙[1] 张博[1] 

机构地区：[1]军械工程学院光学与电子工程系,河北石家庄050003

出　　处：《激光与红外》2008年第10期1004-1007,共4页Laser & Infrared

基　　金：中国博士后科学基金(No.20060400418);军械工程学院重点研究基金(No.YJJXM05002)资助

摘　　要：具有一定能量强度的激光辐照CCD图像探测器时可造成探测器的干扰和破坏。基于热传导和热弹性力学的基本关系式建立了脉冲激光辐照CCD多层结构的热力耦合数学物理模型,对热传导方程和应力平衡方程进行有限元数值求解,计算得到不同能量密度下脉冲激光辐照CCD的瞬态温度场和热应力场,分析了CCD最易损伤的位置及激光参数对探测器损伤的影响,并结合CCD的像元构造和工作方式阐明了CCD各层结构的损伤对CCD成像质量的影响程度及影响机理。CCD arrays can be disturbed or damaged when subjected to laser irradiation. The multilayer thermal-mechanical physical model of CCD irradiated by pulsed laser is set up based on heat conduction and thermal elastic mechanics theories, the heat conduction differential equation and stress-balance equation are solved by the finite elements method. The transient temperature field, thermal stress field and the most probably damaged position are obtained, with CCD pixel structure and operation mode presented, the influences of laser parameters and each damaged layer to CCD imaging formation are discussed as well.

关 键 词：激光破坏 CCD 损伤机理 温度场 热应力场 

分 类 号：TN386[电子电信—物理电子学] TN249