中国物理B ›› 2017, Vol. 26 ›› Issue (6): 64203-064203.doi: 10.1088/1674-1056/26/6/064203

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Investigation of the nonlinear CPT spectrum of 87Rb and its application for large dynamic magnetic measurement

Chi Xu(徐迟), Shi-Guang Wang(王时光), Yong Hu(胡勇), Yan-Ying Feng(冯焱颖), Li-Jun Wang(王力军)   

  1. 1 Department of Physics, Tsinghua University, Beijing 100084, China;
    2 Joint Institute for Measurement Science, Tsinghua University, Beijing 100084, China;
    3 State Key Laboratory of Precision Measurement Technology and Instrument, Tsinghua University, Beijing 100084, China
  • 收稿日期:2016-12-27 修回日期:2017-02-13 出版日期:2017-06-05 发布日期:2017-06-05
  • 通讯作者: Yan-Ying Feng, Li-Jun Wang E-mail:yyfeng@tsinghua.edu.cn;lwan@tsinghua.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 61473166) and China Postdoctoral Science Foundation (Grant No. 014M560958).

Investigation of the nonlinear CPT spectrum of 87Rb and its application for large dynamic magnetic measurement

Chi Xu(徐迟)1,2, Shi-Guang Wang(王时光)2,3, Yong Hu(胡勇)2,3, Yan-Ying Feng(冯焱颖)2,3, Li-Jun Wang(王力军)1,2,3   

  1. 1 Department of Physics, Tsinghua University, Beijing 100084, China;
    2 Joint Institute for Measurement Science, Tsinghua University, Beijing 100084, China;
    3 State Key Laboratory of Precision Measurement Technology and Instrument, Tsinghua University, Beijing 100084, China
  • Received:2016-12-27 Revised:2017-02-13 Online:2017-06-05 Published:2017-06-05
  • Contact: Yan-Ying Feng, Li-Jun Wang E-mail:yyfeng@tsinghua.edu.cn;lwan@tsinghua.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 61473166) and China Postdoctoral Science Foundation (Grant No. 014M560958).

摘要:

The coherent population trapping (CPT) phenomenon has found widespread application in quantum precision measurements. Various designs based on the narrow resonant spectrum corresponding to the linear Zeeman effect have been demonstrated to achieve high performance. In this article, the nonlinear Zeeman split of the CPT spectrum of 87Rb in the lin||lin setup is investigated. We observe re-split phenomenon for both magnetic sensitive and magnetic insensitive CPT resonant lines at a large magnetic field. The re-split in the magnetic sensitive lines raises a practical problem to magnetometers worked in the lin||lin setup while the other one shows a good potential for applications in large magnetic field. We propose a design based on the nonlinear split of the magnetic insensitive lines and test its performance. It provides a much larger measurement range compared to the linear one, offering an option for atomic magnetometers where a large dynamic range is preferred.

关键词: coherent population trapping, nonlinear Zeeman effect, large dynamic magnetometer

Abstract:

The coherent population trapping (CPT) phenomenon has found widespread application in quantum precision measurements. Various designs based on the narrow resonant spectrum corresponding to the linear Zeeman effect have been demonstrated to achieve high performance. In this article, the nonlinear Zeeman split of the CPT spectrum of 87Rb in the lin||lin setup is investigated. We observe re-split phenomenon for both magnetic sensitive and magnetic insensitive CPT resonant lines at a large magnetic field. The re-split in the magnetic sensitive lines raises a practical problem to magnetometers worked in the lin||lin setup while the other one shows a good potential for applications in large magnetic field. We propose a design based on the nonlinear split of the magnetic insensitive lines and test its performance. It provides a much larger measurement range compared to the linear one, offering an option for atomic magnetometers where a large dynamic range is preferred.

Key words: coherent population trapping, nonlinear Zeeman effect, large dynamic magnetometer

中图分类号:  (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)

  • 42.50.Gy
32.60.+i (Zeeman and Stark effects) 07.55.Ge (Magnetometers for magnetic field measurements)