基于碘分子调制转移谱与光学腔的583 nm激光稳频实验  

583 nm Laser Frequency Stabilization Experiment Based on Iodine Molecule Modulation Transfer Spectroscopy and Optical Cavity

作　　者：徐萍 张思慧 宋瑞 王杰 武海斌[1] Xu Ping;Zhang Sihui;Song Rui;Wang Jie;Wu Haibin(State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200241,China)

机构地区：[1]华东师范大学精密光谱科学与技术国家重点实验室,上海200241

出　　处：《激光与光电子学进展》2022年第23期163-168,共6页Laser & Optoelectronics Progress

基　　金：国家重点研发计划(2017YFA0304201);国家自然科学基金(11734008);国家自然科学基金青年科学基金(12104158)。

摘　　要：用583 nm半导体倍频激光器获得了碘分子R67(15-1)跃迁的超精细分量调制转移谱(MTS)。针对超冷铒原子实验中冷却光的频率稳定,利用Pound-Drever-Hall(PDH)稳频技术作为前级反馈将激光器稳定在法布里-珀罗腔,用碘分子MTS稳频作为后级反馈,以克服光学参考腔不可避免的长期漂移。稳频后4 h的监测结果表明,相比仅用PDH稳频的漂移量(205 kHz),双系统稳频时的最大频率起伏为±12 kHz,满足超冷铒原子实验系统长时间稳定运转的需求。本方案拓展了碘分子光谱在583 nm激光稳频的应用,也为激光冷却铕、铥等元素中冷却光的频率锁定提供了参考。In this paper,a modulation transfer spectroscopy(MTS)of the hyperfine components at R67(15-1)transition of the iodine molecule is obtained with a 583 nm semiconductor frequency-doubling laser.For frequency stabilization of cooling laser in ultracold erbium experiment,the Pound-Drever-Hall(PDH)technique is used as the prefeedback to stabilize the laser to a Fabry-Perot cavity,and the MTS of iodine molecular is used as the secondary feedback to overcome the inevitable long-term drift of the optical reference cavity.The long-term drift data during 4 h show that,compared with the drift in frequency stabilization using only PDH technique(205 kHz),the maximum frequency fluctuation is within±12 kHz for the two-stage laser stabilization.This meets the long-term stable operation requirements of the ultracold erbium atomic experimental system.The scheme expands the application of iodine molecular spectroscopy in 583 nm laser frequency stabilization,and provides a strategy for laser stabilization of cooling light in cold atom experiment with elements such as europium and thulium.

关 键 词：激光器 调制转移谱 激光稳频 碘分子 超冷原子 

分 类 号：TN248[电子电信—物理电子学]