面向空间引力波探测的低噪声稳频激光器  

Low-Noise Frequency Stabilized Laser for Space-Based Gravitational Wave Detection

作　　者：李明[1,2] 黄亚峰[2] 叶美凤 胡笛[2] 方苏 王亚婷 陈胤男 曲亚男 杨钰炜 冯吉军 汪凌珂[2] 刘亮 李唐[2] Li Ming;Huang Yafeng;Ye Meifeng;Hu Di;Fang Su;Wang Yating;Chen Yinnan;Qu Yanan;Yang Yuwei;Feng Jijun;Wang Lingke;Liu Liang;Li Tang(Shanghai Key Laboratory of Modern Optical System,University of Shanghai for Science and Technology,Shanghai 200093,China;Aerospace Laser Engineering Departments,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China)

机构地区：[1]上海理工大学上海市现代光学系统重点实验室,上海200093 [2]中国科学院上海光学精密机械研究所航天激光工程部,上海201800

出　　处：《光学学报》2023年第19期212-218,共7页Acta Optica Sinica

基　　金：国家重点基础研究专项(2021YFC2201803,2021YFC2201904)。

摘　　要：基于未来卫星间激光干涉任务的需求,介绍了一种基于迈克耳孙光纤干涉仪稳频的1064 nm激光稳频系统,该系统采用全光纤器件,结构紧凑、体积小、可靠性强。通过拍频测试,得到该系统的频率噪声在30 mHz~1 Hz范围内小于30 Hz/Hz1/2,频率稳定度在积分时间为1 s和1000 s时分别为1.2×10^(-14)和3×10^(-13)。该系统的性能满足LISA任务对稳频激光的需求,有望应用于未来的空间引力波探测任务。Objective With the success of ground-based gravitational wave detection,space-based gravitational wave detection has attracted wide attention from many research institutions around the world.The missions such as Laser Interferometer Space Antenna(LISA)initiated by NASA and ESA,New Gravitational Wave Observatory(NGO)initiated by ESA,and Tianqin program and Taiji program proposed by China,have high demands on the laser frequency noise at low Fourier frequencies between 0.1 mHz and 1 Hz.In order to fully meet the demands of those missions,the development of ultrastable lasers with higher frequency stability and coherence has never been suspended.Currently,the most popular way to achieve ultra-stable lasers is to stabilize the laser frequency onto a high-finesse Fabry-Perot(F-P)cavity by using the Pound-Drever-Hall(PDH)method.However,it requires fine alignment of free-space optical components and precise spatial mode matching,which dramatically increases the complexity and bulk of the system and is easily disturbed by the external environment.Therefore,it is difficult to meet the requirements in the transportable applications of ultra-stable laser systems.In this article,an alternative approach is proposed,which uses an optical fiber-delay-line(FDL)as a frequency discriminator to stabilize the laser frequency.This approach has the advantages of high compactness,high reliability,small volume,and light weight,which make it a viable candidate for future laser-based gravitational wave detection missions.Methods The frequency stabilization of lasers is realized by using an unequal arm heterodyne Michelson fiber interferometer composed of an optical fiber delay line of 500 m.In order to reduce the influence of vibration noises on frequency-stabilized lasers,the optical fiber delay line of 500 m is precisely coiled on a low vibration sensitivity fiber spool.Then,the entire interferometer is placed in a small vacuum chamber,where all components such as an optical delay line of 500 m,single mode broadband coupler module(SMCM)

关 键 词：激光光学 稳频 光纤干涉仪 频率噪声 

分 类 号：TN248[电子电信—物理电子学]