超长空间激光传输数值模拟研究进展  

Research progress on numerical simulations of long space laser propagation

作　　者：华喆怿 徐兆锐 彭韶婧 刘烨[1] 刘崇[1] 吴兰[1] 刘东[1] Hua Zheyi;Xu Zhaorui;Peng Shaojing;Liu Ye;Liu Chong;Wu Lan;Liu Dong(State Key Laboratory of Modern Optical Instrumentation,College of Optical Science and Engineering,Zhejiang University,Hangzhou,Zhejiang 310027,China)

机构地区：[1]浙江大学光电科学与工程学院现代光学仪器国家重点实验室,浙江杭州310027

出　　处：《光电工程》2024年第2期23-32,共10页Opto-Electronic Engineering

基　　金：国家重点研发计划(2021YFC2202001)。

摘　　要：文章主要围绕空间引力波探测中超长空间链路传输部分进行介绍,概述了目前国内外星间传输仿真时采用的计算方法,以及指向抖动引起的相位噪声分析方法。相较于地基引力波探测,空间引力波探测可以有效降低噪声,增加干涉臂长度,从而实现更高精度、更低频率的探测。在长达数百万公里的传输距离,以及皮米量级数值模拟的精度要求下,需要考虑指向角变化引起的相位噪声。研究表明,在2.5×10~9 m的传输距离下,离焦和像散是影响指向抖动噪声的主要像差。通常情况下,相位驻点位置与原点位置存在一定偏离,需要对望远镜角度进行调整,才能使相位噪声最小化。在相位驻点位置进行引力波探测,可以有效降低相位噪声,并降低望远镜出瞳波前的质量要求。而大的离焦像差与小的彗差可以使相位驻点接近光轴,提高接收到的激光功率。This paper mainly introduces the development of space gravitational wave transmission and laser propagation in space gravitational wave detection.We profile the calculation methods used in the simulation of laser propagation and jitter noise in space-based laser interferometry.Compared with ground detection,space gravitational wave detection can effectively reduce noise and increase the length of the interference arm to realize high-precision gravitational wave detection.Under the distance of millions of kilometers and the precision requirements of the picometer level,it is necessary to consider the phase noise caused by pointing jitter with the telescope.Research has shown that defocus and astigmatism are the main aberrations affecting jitter noise at a distance of 2.5×10~9 m.There is a deviation between the phase stationary point and the origin position.To minimize the phase noise,the telescope angle needs to be adjusted.The gravitational wave detection at the phase stationary point can effectively reduce the phase noise and the requirements of the telescope exit pupil wavefront RMS.The large defocus and small coma can make the phase stationary point close to the optical axis and increase the received laser power.

关 键 词：空间引力波探测 空间链路传输 指向抖动噪声 相位驻点 

分 类 号：O439[机械工程—光学工程] TH743[理学—光学]