Indirect pumping bell-bloom magnetometer  

作　　者：王梦冰 赵大法 张桂迎 赵凯锋 

机构地区：[1]Institute of Modern Physics Fudan University [2]Department of Nuclear Science and Technology Fudan University [3]Department of Applied Physics Zhejiang University of Technology

出　　处：《Chinese Physics B》2017年第10期141-146,共6页中国物理B（英文版）

基　　金：supported by the Natural Science Foundation of Shanghai(Grant No.16ZR1402700);the National Natural Science Foundation of China(Grant No.91636102);the National Key Research and Development Program of China(Grant No.2016YFA0302000)

摘　　要：When the ground state hyperfine splitting of alkali metal vapor atoms is well optically resolved, the spin coherence on one hyperfine sublevel can be generated directly or indirectly by pumping the same or the other sublevel respectively. We experimentally studied the pump power dependence of the field response of a Bell-Bloom magnetometer for the two pumping schemes in a paraffin coated ^87Rb vapor cell. We find that although the maximum field response is achieved by combining the two pumping schemes, indirect pumping alone can do nearly as good while being much simpler to operate. We have achieved a sensitivity of 100 fT/Hz^1/2 with a single indirect pump at room temperature.When the ground state hyperfine splitting of alkali metal vapor atoms is well optically resolved, the spin coherence on one hyperfine sublevel can be generated directly or indirectly by pumping the same or the other sublevel respectively. We experimentally studied the pump power dependence of the field response of a Bell-Bloom magnetometer for the two pumping schemes in a paraffin coated ^87Rb vapor cell. We find that although the maximum field response is achieved by combining the two pumping schemes, indirect pumping alone can do nearly as good while being much simpler to operate. We have achieved a sensitivity of 100 fT/Hz^1/2 with a single indirect pump at room temperature.

关 键 词：indirect pumping anti-relaxation coating power broadening MAGNETOMETRY 

分 类 号：O562[理学—原子与分子物理]