摘要
针对空间引力波探测中星内检验质量的高灵敏测量需求,构建了激光外差干涉测量地面模拟系统,开展皮米级平动测量技术研究。首先,开展真空环境下激光外差干涉测量系统的平动灵敏度测试。接着,根据灵敏度结果开展激光外差干涉测量系统噪声溯源研究,分析多种噪声源作用机理、探索主导噪声源消减方案。最后,在噪声溯源分析的基础上完成激光外差干涉测量系统优化。测试结果表明平动测量灵敏度优于1 pm/Hz^(1/2)@30 mHz-1 Hz。该研究有望为空间引力波探测中皮米级激光干涉测量技术的进一步发展提供可靠的噪声溯源地面测试平台。
To address the high sensitivity measurement requirement of the test mass’s displacement in spaceborne gravitational wave detection,a ground-based simulation system using laser heterodyne interferometry has been established,initiating research into picometer-level displacement measurement techniques.Initially,the translational sensitivity of the designed laser heterodyne interferometer is tested under vacuum conditions.Subsequently,based on the sensitivity outcomes,noise source tracing research for the laser heterodyne interferometric system is conducted,including the development of a system noise model,analysis of various noise source mechanisms,and investigation of strategies to reduce the predominant noise sources.Ultimately,upon completion of the noise source tracing,the interferometric system is optimized,with tests indicating a displacement measurement sensitivity better than 1 pm/Hz^(1/2)in the range of 30 mHz to 1 Hz.This paper is expected to provide a reliable ground-based test platform for noise source tracing,facilitating the advancement of picometer-level laser interferometry technologies for spaceborne gravitational wave detection.
作者
徐欣
林湫童
穆衡霖
李子墨
李岩
谈宜东
XU Xin;LIN Qiu-tong;MU Heng-lin;LI Zi-mo;LI Yan;TAN Yi-dong(Department of Precision Instrument,Tsinghua University,Beijing 100084,China)
出处
《中国光学(中英文)》
北大核心
2025年第3期535-546,共12页
Chinese Optics
基金
国家重点研发计划(No.2022YFC2204504,No.2020YFC2200204)
国家资助博士后研究人员计划(No.GZC20240802)。
关键词
空间引力波探测
激光外差干涉
皮米级灵敏度
超精密测量
spaceborne gravitational wave detection
laser heterodyne interferometry
picometer-level sensitivity
ultra-precision measurement
