星间光通信中局部波前畸变对捕获精度的影响

 提出了一种针对反射式光学天线的简单椭圆高斯模型来描述局部波前畸变，研究了星间光通信中局部波前畸变对捕获精度的影响。理论分析和仿真结果表明:局部畸变半径、畸变深度以及畸变位置是影响捕获精度的主要因素;捕获偏差随着畸变半径以及畸变中心相对于光束中心的距离的增大而增大；随局部畸变深度的增加呈周期性振荡衰减变化，且振荡周期和峰值对应的畸变深度不依赖于其它畸变参数。对口径为240 mm的反射式接收天线系统，当遮挡比为0.15时，局部畸变引起的捕获偏差近似可达0.5 μrad。为了减小捕获偏差,所需的光学元件的加工精度应远高于0.25λ。

Effects of localized deformation on acquisition precision in inter-satellite laser communications

In order to simplify the calculation, elliptic Gaussian model for reflection-type optical antenna was proposed to describe localized deformation, based on which, taking reflection-type receiver antenna for example, the effects of localized deformation on acquisition error was researched. The results of analysis and numerical simulation show that the acquisition error depends on the following parameters: deformation radius, deformation depth, and the deformation distance between the localized deformation and the beam center. The acquisition error increases monotonously as the distortion radius, depth and the distance rise. With the increment of the distortion depth, the acquisition error fluctuates periodically like damped oscillation, and the fluctuation period and the peak positions don’