论文标题
实验室开发用于平移和倾斜测量的杂化干涉系统在空间重力波检测中的倾斜度测量
Laboratory development of a heterodyne interferometric system for translation and tilt measurement of the proof mass in the space gravitational wave detection
论文作者
论文摘要
激光杂项干涉测量法通过测量其在空间重力波检测中的多个自由度运动来在证明质量的监视器和控制中起关键作用。本文介绍了使用象限光电遗传学（QPD）的极化 - 多工杂项干涉仪（PMHI）的开发，旨在测量证明质量的翻译和倾斜度。该系统是对称设计的，它可以基于极化 - 插图和差异波沿感测（DWS）扩展到五个自由度测量。地面模拟的实验结果表明，在1 Hz时分别达到了3 pm/hz $^{1/2} $和2 nrad/hz $^{1/2} $的测量噪声。倾斜到长度的误差主要由当前系统的几何未对准，其耦合在微米级别的倾斜范围内为1000μrad。
Laser heterodyne interferometry plays a key role in the proof mass's monitor and control by measuring its multiple degrees of freedom motions in the Space Gravitational Wave Detection. Laboratory development of polarization-multiplexing heterodyne interferometer (PMHI) using quadrant photodetectors (QPD) is presented in this paper, intended for measuring the translation and tilt of a proof mass. The system is of symmetric design, which can expand to five degrees of freedom measurements based on polarization-multiplexing and differential wavefront sensing (DWS). The ground-simulated experimental results demonstrate that a measurement noise of 3 pm/Hz$^{1/2}$ and 2 nrad/Hz$^{1/2}$ at 1 Hz have been achieved respectively. The tilt-to-length error is dominated by geometric misalignment for the current system, the coupling of which is at micrometer level within a tilt range of 1000 μrad.
