望远镜指向抖动与波前畸变耦合的仿真分析(特邀)  

Analysis on the Coupling Effects of Telescope Pointing Jitter and Wavefront Distortion(Invited)

作　　者：王鹏[1] 张洪霄 林旭东 李明[1] WANG Peng;ZHANG Hongxiao;LIN Xudong;LI Ming(MOE Key Laboratory of TianQin Mission,TianQin Research Center for Gravitational Physics&School of Physics and Astronomy,Frontiers Science Center for TianQin,CNSA Research Center for Gravitational Waves,Sun Yat-sen University,Zhuhai 519082,China)

机构地区：[1]中山大学天琴中心&物理与天文学院,天琴前沿科学中心,天琴计划教育部重点实验室,国家航天局引力波研究中心,珠海519082

出　　处：《光子学报》2025年第2期50-57,共8页Acta Photonica Sinica

基　　金：国家重点研究发展计划(No.2022YFC2203800)。

摘　　要：现有的模型中耦合噪声的提取方法精度不足,提出采用精度更高且速度较快的差分进化算法提取耦合噪声。基于该方法并结合蒙特卡洛仿真给出了满足噪声指标1 pm/Hz^(1/2)和10 pm/Hz^(1/2)@0.1 mHz~1 Hz时的望远镜出瞳波前质量与指向抖动指标,为后期望远镜的制造与指向操控系统提供了理论基础。Space gravitational wave detection refers to the method of using satellite formation or constellation to construct a large laser interferometer with interference arms of more than ten kilometers or even millions of kilometers in space to detect gravitational waves.One of the key indicators is that the ranging accuracy of laser interferometry needs to be better than 1~10 pm/Hz^(1/2)@0.1 mHz~1Hz.In the intersatellite laser interferometer,which was necessary to use the telescope to collimate and expand the laser beam.Due to wavefront distortion of telescope,light field transmitted to spacecraft 2 will deviate from ideal spherical wave during the intersatellite transmission.After coupling pointing jitter of telescope caused by non-conservative forces and other reasons,the phase of light field received by spacecraft 2 will change with the pointing jitter,which will eventually introduce noise in the measurement system.In order to study the error caused by the coupling of wavefront distortion and pointing jitter,the far-field phase distribution with wavefront distortion was obtained by using Kirchhoff scalar diffraction model and Zernike aberration model.After linearization,the phase and displacement noise related to pointing jitter can be obtained.Using this method,the predecessors established the noise generated by the telescope wavefront composed of different order aberrations and wavefront RMS values after far-field transmission,and analyzed the pointing direction of the telescope to reduce the coupling noise and gave how to make the optimal pointing of the telescope close to the intersatellite visual axis to assist pointing.The above research mainly focuses on analyzing the wavefront quality and aberration distribution of the outgoing pupil of the telescope,and the coupling noise can be quickly extracted by linearizing the far-field phase formula.Due to the accuracy loss in the process of linearizing the far-field phase,the numerical simulation is carried out by using the traversal method with higher accuracy and t

关 键 词：空间引力波探测 星间激光干涉 望远镜 波前畸变 指向抖动 

分 类 号：TH744[机械工程—光学工程]