原子干涉仪中拉曼激光的相位-频率双调制稳频

J4 ›› 2016, Vol. 33 ›› Issue (6): 689-696.

原子干涉仪中拉曼激光的相位-频率双调制稳频

李大伟¹,陈曦²,仲嘉琪¹,宋宏伟³,王玉平¹,朱磊¹,王谨⁴,詹明生¹

1中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室，湖北武汉 430071; 2中国科学院冷原子物理中心，湖北武汉 430071; 3中国科学院大学，北京 100049； 4华中科技大学光学与电子信息学院，湖北武汉 430074

收稿日期:2015-04-30 修回日期:2015-05-26 出版日期:2016-11-28 发布日期:2016-11-28
通讯作者: 王谨（1970 -），甘肃人，博士，研究员，主要从事冷原子物理实验研究工作。 E-mail:wangjin@wipm.ac.cn
作者简介:李大伟（1987-），湖北人，研究生，主要从事冷原子与激光光谱方面的研究。Email：lidawei5471@126.com

Phase-frequency double-modulation frequency stabilization of Raman laser in atom interferometer

LI Dawei1,2,3, CHEN Xi1,2, ZHONG Jiaqi1,2, SONG Hongwei1,4, WANG Yuping1,2,3, ZHU Lei1,2,3, WANG Jin1,2, ZHAN Mingsheng1,2

1State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences , Wuhan 430071，China; 2Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071，China; 3 University of Chinese Academy of Sciences, Beijing 100049，China； 4School of Optical and Electronic Information, Huazhong University of Science and Technology，Wuhan 430074，China

Received:2015-04-30 Revised:2015-05-26 Published:2016-11-28 Online:2016-11-28

摘要/Abstract

摘要： 为降低拉曼激光的频率噪声，提出了一种相位-频率双调制稳频技术。用光纤电光相位调制器对激光进行调制并产生大失谐边带；用射频信号对光纤相位调制器的微波驱动信号进行频率调制，通过锁相放大法将一个大失谐边带锁到铷原子的饱和吸收谱线上。利用该技术实现了拉曼种子激光的稳频和2 GHz的移频，拉曼激光的线宽大幅压窄到56 kHz，预期拉曼激光频率噪声引起的原子干涉重力仪的单次测量噪声可降低到7×10-9/s2。

关键词: 激光技术；激光稳频；相位-频率调制；拉曼激光

Abstract: In order to reduce the frequency noise of Raman laser, a phase-frequency double-modulation frequency stabilization technique is proposed. The laser is modulated by a fiber electro-optical phase modulator (F-EOM)and large-detuned sidebands are produced. RF signal is used for the frequency modulation of the microwave driving signal of F-EOM, and one of the large-detuned sidebands is locked to a saturation absorption spectral line of rubidium atoms by lock-in amplification. The frequency stabilization and 2 GHz frequency shift of Raman seed laser are realized by using this technique, and the linewidth of Raman laser is narrowed down to 56 kHz. The single measurement noise of the atom interferometer induced by Raman laser frequency noise is expected to be reduced to 7×10-9/s2/shot.

Key words: laser techniques; laser frequency stabilization; phase-frequency modulation；Raman laser

中图分类号:

O562.3

李大伟陈曦仲嘉琪宋宏伟王玉平朱磊王谨詹明生. 原子干涉仪中拉曼激光的相位-频率双调制稳频[J]. J4, 2016, 33(6): 689-696.

LI Dawei1,2,3, CHEN Xi1,2, ZHONG Jiaqi1,2, SONG Hongwei1,4, WANG Yuping1,2,3, ZHU Lei1,2,3,. Phase-frequency double-modulation frequency stabilization of Raman laser in atom interferometer[J]. J4, 2016, 33(6): 689-696.

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