空间高速光电器件辐射效应研究

项目名称： 空间高速光电器件辐射效应研究

项目编号： No.11475078

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 高欣

作者单位： 兰州空间技术物理研究所

项目金额： 80万元

中文摘要： 空间辐射环境是空间激光通信系统所用光电器件性能衰退的重要因素，随着我国空间激光通信技术的逐步应用，对这些元器件空间辐射效应的研究越来越迫切。由于光电器件封装材料难以去除的特殊性，对加速器的质子和电子有较大的衰减，严重影响了光电器件空间辐射效应评估结果的准确性。本项目针对我国空间激光通信系统所用高速半导体激光二极管和雪崩光电二极管，建立辐射屏蔽模型，模拟计算出经器件封装屏蔽后辐照到器件敏感区各层材料中的带电粒子的能量与注量分布情况；基于非电离能损理论，对复杂化学配比的光电材料的非电离能损进行计算，获得辐照粒子在光电器件敏感区材料中沉积的精确辐射损伤剂量；结合试验数据，开展不同辐射源对光电器件辐射损伤等效性研究，以便能够利用钴源和中子高穿透能力的优点，简化带封装光电器件辐射损伤评价方法，为光电器件辐射效应研究提供新的思路，也为我国空间激光通信系统抗辐射设计提供精确的参考数据。

中文关键词： 空间辐射；辐射效应；损伤机理

英文摘要： The space radiation environment is an important factor for the degradation of optoelectronic devices used in space laser communication system. With the future gradual deployment of Chinese space laser communication systems, it is urgent to study the radiation effects of these devices. Due to the difficulty in completely removing packaging material of optoelectronics, thereby resulting in a degradation of injecting particle energies, the radaition damage results of optoelectronic devices given by present experimental method are not accurate. In this study, the radiation shielding model of the high speed laser diodes and avanlanch photodiodes for Chinese laser communication satellites are set up, and are analyzed to obtain the energy and fluence distributions in different layers of the device sensitivie regions behind the packages; based on the non-ionizing energy loss (NIEL) theory, we simulate the NIEL values of complex stoichiometric optoelectronic materials and calculate the damage dose depositing on the active layers of the device. Then, by incorporating the irradiation experimental data, the equivalence of radiation damages between different radiation sources, in order to untilize the advantage of highe penetrating Co-60 and neutron sources to simplify the evaluating procedures of radiation effects for optoelectronic devices with a package. The researh results can provide a new technique for the study of radiation effects on optoelectronic devices, meanwhile, also providing a precise reference data for the radiation hardness design of Chinese space laser communication systems.

英文关键词： space radiation;radiation effects;damage mechanism