应用于空间激光通信系统的偏瞳天线设计  

Design of Eccentric-Pupil Optical Antenna for Space Laser Communications

作　　者：赵发财 孙权社[1] 陈坤峰[1] 韩忠[1] 

机构地区：[1]中国电子科技集团公司第四十一研究所,山东青岛266555 [2]电子测试技术重点实验室,山东青岛266555

出　　处：《光学学报》2014年第B12期81-87,共7页Acta Optica Sinica

基　　金：电子测试技术重点实验室基金（9140C120302130C12052）

摘　　要：提出了一种空间激光通信系统的偏瞳天线系统，以克服传统卡塞格林两镜系统存在接收视场小、发射效率低等缺点。基于矢量波像差理论，提出了一种偏瞳天线光学系统的光学设计方法。作为实例，设计了一个通光孔径为200 mm，放大倍率为20，满足0.85、1.064、1.55 μm多个通信波段的光学天线系统。计算了初始结构参数，利用光学设计软件ZEMAX-EE对该光学天线系统进行了光线追迹和优化设计，并对设计结果进行分析。分析结果表明，在整个工作波段（0.85、1.064、1.55 μm）内，点列图半径几何值小于35 μrad，实现了高放大倍率、宽波段像散同时校正，在宽波段内均达到衍射极限，满足高性能空间激光通信系统设计指标要求。该结果进一步证实了设计方法的可行性。An optical design of a space laser communications optical antenna system is proposed to overcome the traditional on-axis Cassegrain optical antenna′s disadvantages of small field of view and low emission efficiency. The optical design method of the eccentric-pupil optical antenna system is developed based on the theory of vector aberrations. As an example, an optical antenna system operating at 0.85, 1.064, 1.55 μm with aperture size of 200 mm, magnification of 20 is design. The initial parameters are computed, and the ray tracing and optimization for the optical antenna system are performed with ZEMAX-EE software. The analyzed results demonstrate that the root mean square （RMS） of a spot radius is less than 35 μrad at the working wavelength （0.85, 1.064, 1.55 μm）, which implements astigmatism correction and obtains a good diffraction-limited quality in a wide spectral region and a high magnification. These results meet the requirements of the high performance space laser communication system design indicators and prove the feasibility of the optical design method proposed.

关 键 词：光通信 空间激光通信 偏瞳天线 矢量像差 

分 类 号：TN929.1[电子电信—通信与信息系统]