Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (12): 120702-120702.doi: 10.1088/1674-1056/22/12/120702

• GENERAL • 上一篇    下一篇

A laser pump-re-pump atomic magnetometer

杨爱林, 杨国卿, 蔡勋明, 徐云飞, 林强   

  1. Institute of Optics, Department of Physics, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2012-11-27 修回日期:2013-05-09 出版日期:2013-10-25 发布日期:2013-10-25
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 60925022 and 11104243), the Fundamental Research Funds for the Central Universities, China (Grant No. 2012FZA3001), and the National Key Basic Research and Development Program of China (Grant No. 2013CB329501).

A laser pump-re-pump atomic magnetometer

Yang Ai-Lin (杨爱林), Yang Guo-Qing (杨国卿), Cai Xun-Ming (蔡勋明), Xu Yun-Fei (徐云飞), Lin Qiang (林强)   

  1. Institute of Optics, Department of Physics, Zhejiang University, Hangzhou 310027, China
  • Received:2012-11-27 Revised:2013-05-09 Online:2013-10-25 Published:2013-10-25
  • Contact: Lin Qiang E-mail:qlin@zju.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 60925022 and 11104243), the Fundamental Research Funds for the Central Universities, China (Grant No. 2012FZA3001), and the National Key Basic Research and Development Program of China (Grant No. 2013CB329501).

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摘要： We demonstrate experimentally an atomic magnetometer based on optical pumping theory, a magnetic resonance that is induced by a radio frequency field and dependent on the magnetic field strength. Compared with the conventional method using one radiation field, which is used not only as the probe beam but also as a pump beam, the additional re-pump beam can increase remarkably the amplitude of the signal. It is shown that the amplitude of the magnetic field resonance signal can increase more than 55% by using an additional re-pump beam, which makes the sensitivity of the magnetometer higher. Finally, we investigate the relation between amplitude of the signal and re-pump laser power, and calculate the atomic population in the trapping states with rate equations.

关键词: atomic magnetometer, optical pumping, sensitivity

Abstract: We demonstrate experimentally an atomic magnetometer based on optical pumping theory, a magnetic resonance that is induced by a radio frequency field and dependent on the magnetic field strength. Compared with the conventional method using one radiation field, which is used not only as the probe beam but also as a pump beam, the additional re-pump beam can increase remarkably the amplitude of the signal. It is shown that the amplitude of the magnetic field resonance signal can increase more than 55% by using an additional re-pump beam, which makes the sensitivity of the magnetometer higher. Finally, we investigate the relation between amplitude of the signal and re-pump laser power, and calculate the atomic population in the trapping states with rate equations.

Key words: atomic magnetometer, optical pumping, sensitivity

中图分类号:  (Magnetometers for magnetic field measurements)

  • 07.55.Ge
76.70.Hb (Optically detected magnetic resonance (ODMR)) 33.80.Be (Level crossing and optical pumping) 42.62.Eh (Metrological applications; optical frequency synthesizers for precision spectroscopy)