MS1和MS2试验星是我国首批设计寿命10年的中高轨导航卫星, 为提高在轨精度和实现卫星精密定位, 作为舱外有效载荷, 两颗卫星均标配搭载了激光反射器。卫星激光反射器光学设计应考虑远场衍射等物理光学影响, 不能仅考虑几何光学理论设计。以试验星反射器为例, 基于角反射器光学远场衍射能量分布理论为基础, 采用最大雷达截面法进行反射器尺寸优化, 利用角度补偿法进行速差补偿角设计, 对反射器表面加工精度、反射表面特性、切割方式等光学参数进行优化分析计算, 并通过合理的机械结构和材料设计, 解决了高量级力学环境、330 ℃高低温度交变、10年空间辐照寿命等环境适应性问题。试验星光学测试结果表明: 参数设计合理, 可实现远场环带能量在预定观测区域的最大化, 在轨观测数据表明反射器工作正常, 测距精度、测距范围等指标满足预期设计, 理论设计和实践相符, 这对今后同类激光反射器的设计具有借鉴和指导意义。
激光反射器 卫星激光测距 光机设计 环境适应性 laser reflector satellite laser ranging opto-mechanical design environmental adaptability 红外与激光工程
2018, 47(8): 0806005
Author Affiliations
Abstract
1 School of Technical Physics, Xidian University, Xi'an 710071
2 National Key Laboratory of Solid-State Laser, North China Research Institute of Electro-Optics, Beijing 100015
The three-dimensional (3D) pump intensity distribution in medium of the laser diode (LD) pumped high average power heat capacity laser is simulated by the ray tracing method, and the divergence characteristics of fast axis and slow axis of LD are simultaneously considered. The transient 3D temperature and stress distributions are also simulated by the finite element method (FEM) with considering the uneven heat source distribution in medium. A LD face-pumped Nd:GGG heat capacity laser is designed. The average output power is 1.49 kW with an optical-optical efficiency of 24.1%.
热容激光器 二极管端面抽运 Nd:GGG 抽运光分布 热结构分布 140.3480 Lasers, diode-pumped 140.6810 Thermal effects 120.6810 Thermal effects 000.4430 Numerical approximation and analysis Chinese Optics Letters
2006, 4(11): 658
