非机械指向空间激光通信接收系统设计与分析  

Design and Analysis of Non-mechanical Beam-steering Space Laser Communication Receiver System

作　　者：王俊扬 刘壮[2,3] 王启东 尚卫东 WANG Junyang;LIU Zhuang;WANG Qidong;SHANG Weidong(School of Opto-Electronic Engineering,Changchun University of Science and Technology,Changchun 130022;Institute of Space Photo-electronics Technology,Changchun University of Science and Technology,Changchun 130022;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033;Beijing Institute of Space Mechanics&Electricity,Beijing 100094)

机构地区：[1]长春理工大学光电工程学院,长春130022 [2]长春理工大学空间光电技术研究所,长春130022 [3]长春光学精密机械与物理研究所,长春130033 [4]北京空间机电研究所,北京100094

出　　处：《长春理工大学学报（自然科学版）》2024年第4期1-8,共8页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金(U22A201483);应用光学国家重点实验室开放基金(SKLAO2021001A08)。

摘　　要：采用非机械指向结构能够极大缩小空间激光通信系统尺寸与重量,由于现有器件性能局限,目前尚未见到成熟的非机械指向空间激光通信接收系统。提出基于正交液晶级联偏振光栅与四象限探测器的空间激光通信接收光学系统,利用了正交液晶级联偏振光栅体积小、口径大、偏转范围大,及四象限探测器接收角度范围大的优势,根据正交液晶级联偏振光栅与四象限探测器的理论与器件性能,设计了光学系统,分析了探测器噪声、背景噪声、系统噪声对于通信与入射角度测量的影响,计算了可实现的通信速率,给出了系统的最大响应角速度。The use of non-mechanical beam-steering structures offers the potential for significant reduction in the size and weight of space laser communication systems.However,mature non-mechanical beam-steering space laser communication receiver systems have not yet been realized due to limitations in existing devices.This study proposes an optical system for space laser communication reception based on orthogonal cascade liquid crystal polarization gratings(OC-LCPGs) and four-quadrant detectors(4QDs).Considering the theoretical and performance characteristics of OC-LCPGs and 4QDs,the proposed optical system is designed considering the advantages of OC-LCPGs,such as compact size,large aperture,and wide deflection range,combined with the large angle reception capabilities of 4QDs.According to the theory and device performance of quadrature liquid crystal cascade polarization grating and four-quadrant detector,the optical system is designed.Furthermore,the influence of detector noise,background noise,and system noise on communication and incident angle measurements of the optical system is analysed.Additionally,we propose a calculation method for achievable communication rate,and we analyze the maximum response angular velocity of the system.

关 键 词：空间激光通信 液晶偏振光栅 四象限探测器 噪声 响应角速度 

分 类 号：O439[机械工程—光学工程]