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
张军海, 曾宪金, 李庆萌, 黄强, 孙伟民
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)
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.
中图分类号: (Level crossing and optical pumping)