应用于积分球冷原子钟的窄线宽激光稳频系统  

Narrow Linewidth Laser Frequency Stabilization System for Integrating Sphere Cold Atom Clock

作　　者：亓航航 杨博文 赵浩杰 肖玲[1] 邓见辽[1] 成华东[1] Qi Hanghang;Yang Bowen;Zhao Haojie;Xiao Ling;Deng Jianliao;Cheng Huadong(Key Laboratory of Quantum Optics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海光学精密机械研究所量子光学重点实验室,上海201800 [2]中国科学院大学,北京100049

出　　处：《激光与光电子学进展》2023年第15期250-254,共5页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61875215,12174409)。

摘　　要：通过调制转移光谱稳频的方式,将外腔半导体激光器频率锁定于^(87)Rb原子D_(2)线超精细跃迁5^(2)S_(1/2),F=2→5^(2)P_(3/2),F=3,使激光器线宽由自由运转的382.18 kHz压窄至稳频后的37.94 kHz。稳频后的窄线宽激光用于积分球冷原子钟的探测光,可以将激光频率噪声对原子钟短期稳定度的影响降低至5.6×10^(-14)τ^(-1/2)。In this study,the frequency of the external cavity diode laser(ECDL)is locked to the hyperfine transition of ^(87)Rb D_(2) line 5^(2)S^(1/2),F=2→5^(2)P^(3/2),F=3 using modulation transfer spectroscopy(MTS)frequency stabilization.The laser linewidth is narrowed from 382.18 kHz in the free-running mode to 37.94 kHz after frequency stabilization.The narrow linewidth laser after frequency stabilization can be utilized as the probe light for the integrating sphere cold atom clock.Thus,the contribution of the laser frequency noise to the short-term instability of the atomic clock could be smaller than 5.6×10^(-14)τ^(-1/2).

关 键 词：激光器与激光光学 调制转移光谱 激光稳频 外腔半导体激光器 积分球冷原子钟 频率稳定度 

分 类 号：TN249[电子电信—物理电子学]