光学学报, 2013, 33 (s1): s101001, 网络出版: 2013-06-25
地基自适应光学钠导引星参数影响因素分析
Analysis on Effect Factors of Laser Energy of Sodium Guide Stars for Ground-Based Adaptive Optical System
摘要
钠导引星激光参数指标主要受到自适应光学系统的校正能力、大气条件、观测目标运动的时空特性、钠层非线性饱和效应等因素影响。在综合上述影响因素基础上，从自适应光学导引激光器的参数指标论证角度，给出了钠导引激光能量的计算公式，同时将信标视星等亮度引入到计算公式；分析给出了不同自适应光学望远镜系统口径条件下，能提供完整波前信息的钠导引星个数需求；重点分析了不同自适应光学预期校正效果、大气相干长度、观测俯仰角等对信标激光能量的影响；结合实际工程应用需求，模拟计算了特定条件下导引信标激光能量与信标视星等的关系。
Abstract
The parameters of sodium lasers is related to RMS wavefront error of adaptive optical system, atmosphere conditions, space-time character of space-object and the saturation of sodium lasers guide. Based on analysis of effect factors, a calculation formula of guide lasers energy is given. The calculation formula, including the magnitude of guide star, is derived. The number of guide star is discussed with different diameters of adaptive optical system.The influence of the RMS wavefront error, atmospheric coherent length, observation elevation on the beacon laser energy is mainly analyzed. Under the given conditions,the beacon laser energy for the wavefront detecting requirement of adaptive optical system is calculated at different magnitudes.
张己化, 蔡雷, 张晓飞, 高国昌, 杨雨川, 陈力子, 谭碧涛. 地基自适应光学钠导引星参数影响因素分析[J]. 光学学报, 2013, 33(s1): s101001. Zhang Jihua, Cai Lei, Zhang Xiaofei, Gao Guochang, Yang Yuchuan, Chen Lizi, Tan Bitao. Analysis on Effect Factors of Laser Energy of Sodium Guide Stars for Ground-Based Adaptive Optical System[J]. Acta Optica Sinica, 2013, 33(s1): s101001.
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