空间激光干涉仪激光抖动噪声抑制研究  

Noise suppression of laser jitter in space laser interferometer

作　　者：王璐钰 李玉琼[3] 蔡榕 WANG Lu-yu;LI Yu-qiong;CAI Rong(Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;School of Aeronautics and Astronautics,University of Chinese Academy of Sciences,Beijing 101408,China;Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100094 [2]中国科学院大学航空宇航学院,北京101408 [3]中国科学院力学研究所,北京100190

出　　处：《中国光学》2021年第6期1426-1434,共9页Chinese Optics

基　　金：中国科学院青年创新促进会(No.2018024);中国科学院战略重点研究计划(No.XDA17020103);国家自然科学基金(No.61575209)。

摘　　要：在"太极计划"中,由卫星抖动引起的激光抖动噪声是影响激光干涉测量精度的主要噪声源之一,为保证测量精度,需抑制该噪声至10 nrad/√(Hz)@10 mHz。首先,采用由四象限光电探测器和相位计组成的角度敏感器进行角度信号测量,并利用马赫-曾德干涉仪结合比例-积分-微分控制技术,搭建了地基激光抖动噪声抑制系统。其次,分析了系统反馈控制能力以及系统对于抑制激光抖动噪声的有效性。实验结果表明:该系统可有效抑制激光抖动噪声,使得激光抖动噪声小于4 nrad/√(Hz)@10 mHz。实验推进了"太极计划"对激光抖动噪声抑制水平的研究,为激光干涉测量奠定了物理实验基础。In the“Taiji mission”,the laser jitter noise caused by satellite jitter is one of the main noise sources that affect the accuracy of laser interferometer.In order to ensure the measurement accuracy,the noise must be suppressed to 10 nrad/√Hz@10 mHz.Firstly,an angle sensor composed of a four-quadrant photodetector and a phase meter was used to measure the angle signal,and a Mach-Zehnder interferometer combined with proportional-integral-derivative control technology was used to build a ground-based laser jitter noise suppression system.Secondly,the feedback control capability of the system and the effectiveness of the system to suppress laser jitter noise were analyzed.The experimental results showed that the system could effectively suppress the laser jitter noise,and the laser jitter noise was<4 nrad/√Hz@10 mHz.The experi-ment advanced the study of the“Taiji mission”on the level of laser jitter noise suppression,which laid a physical experimental foundation for laser interferometry.

关 键 词：太极计划 空间激光干涉仪 激光抖动噪声 

分 类 号：TN249[电子电信—物理电子学]