The detection mission of gravitational waves in space is that the accuracy of the long-baseline intersatellite laser interferometry on the million-kilometer order needs to reach the order of \(8 \rm{pm}/\sqrt{\rm{Hz}}\). Among all noise sources that affect the interferometry accuracy, tilt-to-length (TTL) coupling noise is the second largest source of noise after shot noise. This paper focuses on studying the contribution of TTL coupling noise of the telescope system in the intersatellite scientific interferometer. By referring to the laser interferometer space antenna (LISA)’s noise budget, TTL coupling noise is required to be within ±25μm/rad (±300μrad). Therefore, this paper focuses on studying both the mechanism of TTL coupling noise due to the noise sources of the telescope and the method of suppressing the TTL noise, which can lay a foundation for noise distribution and the development of engineering prototypes in subsequent tasks.

中文翻译：

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星际激光干涉仪中望远镜TTL耦合噪声的研究

引力波在空间中的检测任务是，百万基线的长基线星际激光干涉仪的精度需要达到\（8 \ rm {pm} / \ sqrt {\ rm {Hz}}的量级。\）。在所有影响干涉测量精度的噪声源中，长度对长度（TTL）耦合噪声是仅次于散粒噪声的第二大噪声源。本文重点研究星际科学干涉仪中望远镜系统TTL耦合噪声的贡献。通过参考激光干涉仪空间天线（LISA）的噪声预算，要求TTL耦合噪声在±25μm/ rad（±300μrad）之内。因此，本文既要研究由于望远镜噪声源引起的TTL耦合噪声的机理，又要研究抑制TTL噪声的方法，这可以为噪声分布和后续任务的工程原型开发奠定基础。