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June 5, 2026Chinese Optics0 citationsOpen Access

基于激光外差干涉的测试质量干涉仪转动耦合研究

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YWYue WangJWJuan WangRGRuihong GAO

Key Points

  • This research aims to study the coupling principles of rotational errors in laser heterodyne interferometry for gravitational wave detection.
  • Constructed a test mass interferometer system utilizing laser heterodyne interference and wavefront sensor technology.
  • Calibrated the relationship between the coordinate transformations of the tilt mirror and the detector to minimize coupling errors.
  • Developed a real-time compensation system for dynamic suppression of rotational-coupling errors.
  • Achieved a coupling coefficient of approximately 12.5 mrad/rad for rotational-rotational coupling.
  • Reduced the coupling error of rotational-translational motion by about 90% in the time domain and an order of magnitude in the frequency domain, enhancing system sensitivity.

Abstract

空间引力波探测采用激光外差干涉进行百万公里臂长间的测试质量微小位移波动检测,要求干涉系统在毫赫兹频段达到皮米级测量精度。干涉仪中测试质量的转动会通过转动-转动与转动-平动两类误差耦合共同限制系统灵敏度,本文旨在采取先抑制转动-转动耦合,再抑制转动-平动耦合的策略系统研究这两类误差耦合的耦合原理,建立耦合误差模型,并进行耦合误差消减。本文利用了激光外差干涉与波前传感技术,搭建了测试质量干涉仪系统,实现了位移与转角的高灵敏度测量和噪声分析;通过实验标定了偏摆镜与探测器之间的坐标变换关系,并将偏摆镜旋转至最小耦合角度以使偏摆镜与探测器之间的坐标系尽量重合,实现了转动-转动耦合的抑制;通过几何关系建立了光学模型及实验对参数进行标定,建立了实时补偿系统,实现了对转动-平动耦合实现动态抑制。经过抑制,转动-转动的耦合系数达到了约12.5 mrad/rad;转动-平动的耦合误差在时域消减了约90%,在频域上了降低约一个量级,为空间引力波探测干涉仪的多自由度解耦及噪声抑制奠定了理论和实验基础。

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Cite This Study

Wang et al. (2026) studied this question.

synapsesocial.com/papers/6a2267c3763171746d546590https://doi.org/10.37188/co.2026-0032
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