Ultrastable Nd:YAG 1064-nm lasers with 2.1×10^(-16)frequency stability based on a field-programmable gate array frequency-locked system  

作　　者：Zhenqian Li Zongyu Lu Lingfeng Wan Yuan Ru Lisheng Chen Liufeng Li 赵元昊;郝倩倩;张振;董佳昊;仝鲁阳;刘晶晶;赵丽娜;刘杰;苏良碧

机构地区：[1]Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Wuhan 430071,China

出　　处：《Chinese Optics Letters》2025年第1期67-71,共5页中国光学快报(英文版)

基　　金：supported by the National Key Research and Development Program of China(Nos.2021YFC2201800 and 2020YFC2200300);the National Natural Science Foundation of China(Nos.11327407,11654004,and 11235004);the Strategic Priority Research Program of the Chinese Academy of Sciences(Nos.XDB21010300 and XDB23030202)。

摘　　要：Ultrastable continuous-wave lasers are one of the important elements for space-based gravitational wave detection.Here we present a Pound–Drever–Hall laser frequency-locked system based on a field-programmable gate array,demonstrating its potential to achieve 10-16levels of frequency stability for space applications.The system is employed to lock a spacequalified 1064-nm neodymium-doped yttrium aluminum garnet laser to a laboratory-operated 20-cm ultrastable optical cavity.Major noise contributors are identified as laser intensity fluctuation and residual amplitude modulation.The heterodyne beat measurement shows that the frequency noise spectral density of a single laser is reduced to 2.5 Hz/√Hz at a Fourier frequency of 1 m Hz,and the frequency instability is 2.1×10^(-16)at 1 s and remains below 3.5×10^(-16)up to 6000 s.

关 键 词：narrow-linewidth laser automatic frequency stabilization gravitational wave detection 

分 类 号：TN248[电子电信—物理电子学]