空间原子氧对保偏反射镜偏振对比度的影响  

Effect of Spatial Atomic Oxygen on Polarization Contrast of Polarization-Maintaining Mirror

作　　者：段微波[1] 李大琪[1] 刘保剑 余德明[1] 陈刚[1] 刘定权[1] Duan Weibo;Li Daqi;Liu Baojian;Yu Deming;Chen Gang;Liu Dingquan(Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China)

机构地区：[1]中国科学院上海技术物理研究所,上海200083

出　　处：《光学学报》2018年第11期400-404,共5页Acta Optica Sinica

基　　金：国家自然科学基金(61605229);中国科学院青年创新促进会人才计划(2013160)

摘　　要：选择金属膜层材料Ag和Ta_2O_5、SiO_2、Al_2O_3等多种介质薄膜材料,在石英基底上设计和制备了保偏反射镜,其在810 nm和850 nm波长处的偏振对比度优于10000∶1。结合保偏反射镜所处的轨道环境,进行了原子氧模拟实验,研究了保偏反射镜样品偏振对比度的变化规律。结果表明,随着原子氧剂量的增加,保偏反射镜的偏振对比度呈衰减趋势,且+45°、-45°方向的衰减较水平(H)、垂直(V)方向的更明显。The metal coating material of Ag and dielectric thin film materials such as Ta2O5, SiO2 and Al2O3 are selected for designing and fabricating a kind of polarization-maintaining mirror on the quartz substrate, whose polarization contrasts at wavelengths of 810 nm and 850 nm are superior to 10000：1. With the combination of the orbital environment for the polarization-maintaining mirror, the experiment for simulating the spatial atomic oxygen is conducted and the change law of polarization contrast of the polarization-maintaining mirror sample is investigated. The results show that, with the increase of the dose of the atomic oxygen, the polarization contrast of the polarization-maintaining mirror shows an overall decreasing trend. Moreover, the decreasing trends along the directions of ＋45° and -45° are more obvious than those along the horizontal （H） and vertical （V） directions.

关 键 词：薄膜 保偏反射镜 低地球轨道 原子氧 偏振对比度 

分 类 号：TN65[电子电信—电路与系统]