中国物理B ›› 2013, Vol. 22 ›› Issue (5): 53202-053202.doi: 10.1088/1674-1056/22/5/053202

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Spectrally selective optical pumping in Doppler-broadened cesium atoms

张军海, 曾宪金, 李庆萌, 黄强, 孙伟民   

  1. Science School, Harbin Engineering University, Harbin 150001, China
  • 收稿日期:2012-09-27 修回日期:2012-10-23 出版日期:2013-04-01 发布日期:2013-04-01
  • 基金资助:
    Project supported by the International Cooperation Project of the Ministry of Science and Technology of China (Grant No. 2008DFR20420) and the Fundamental Research Funds for the Central Universities, China (Grant No. HEUCF20111111).

Spectrally selective optical pumping in Doppler-broadened cesium atoms

Zhang Jun-Hai (张军海), Zeng Xian-Jin (曾宪金), Li Qing-Meng (李庆萌), Huang Qiang (黄强), Sun Wei-Min (孙伟民)   

  1. Science School, Harbin Engineering University, Harbin 150001, China
  • Received:2012-09-27 Revised:2012-10-23 Online:2013-04-01 Published:2013-04-01
  • Contact: Zhang Jun-Hai E-mail:jhzhang@hrbeu.edu.cn
  • Supported by:
    Project supported by the International Cooperation Project of the Ministry of Science and Technology of China (Grant No. 2008DFR20420) and the Fundamental Research Funds for the Central Universities, China (Grant No. HEUCF20111111).

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摘要： The D1 line spectrally selective pumping process in Doppler-broadened cesium is analyzed by solving the optical Bloch equations. The process, described by a three-level model with the L scheme, shows that the saturation intensity of broadened atoms is three orders of magnitude larger than that of resting atoms. The |Fg =3>→|Fe =4> resonance pumping can result in the ground state |Fg =4, mF =4i sublevel having a maximum population of 0.157 and the population difference would be about 0.01 in two adjacent magnetic sublevels of the hyperfine (HF) state Fg =4. To enhance the anisotropy in the ground state, we suggest employing dichromatic optical HF pumping by adding a laser to excite D1 line |Fg =4>→jFe =3> transition, in which the cesium magnetometer sensitivity increases by half a magnitude and is unaffected by the nonlinear Zeeman effect even in Earth’s average magnetic field.

关键词: spectrally selective pumping, hyperfine structure, population

Abstract: The D1 line spectrally selective pumping process in Doppler-broadened cesium is analyzed by solving the optical Bloch equations. The process, described by a three-level model with the L scheme, shows that the saturation intensity of broadened atoms is three orders of magnitude larger than that of resting atoms. The |Fg =3>→|Fe =4> resonance pumping can result in the ground state |Fg =4, mF =4i sublevel having a maximum population of 0.157 and the population difference would be about 0.01 in two adjacent magnetic sublevels of the hyperfine (HF) state Fg =4. To enhance the anisotropy in the ground state, we suggest employing dichromatic optical HF pumping by adding a laser to excite D1 line |Fg =4>→jFe =3> transition, in which the cesium magnetometer sensitivity increases by half a magnitude and is unaffected by the nonlinear Zeeman effect even in Earth’s average magnetic field.

Key words: spectrally selective pumping, hyperfine structure, population

中图分类号:  (Level crossing and optical pumping)

  • 32.80.Xx
32.10.-f (Properties of atoms) 32.30.-r (Atomic spectra?)