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Chin. Phys. B, 2017, Vol. 26(10): 100701    DOI: 10.1088/1674-1056/26/10/100701
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Indirect pumping bell-bloom magnetometer

Meng-Bing Wang(王梦冰)1, Da-Fa Zhao(赵大法)2, Gui-Ying Zhang(张桂迎)1,3, Kai-Feng Zhao(赵凯锋)1
1. Institute of Modern Physics, Fudan University, Shanghai 200433, China;
2. Department of Nuclear Science and Technology, Fudan University, Shanghai 200433, China;
3. Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310023, China
Abstract  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/Hz1/2 with a single indirect pump at room temperature.
Keywords:  indirect pumping      anti-relaxation coating      power broadening      magnetometry  
Received:  10 April 2017      Revised:  08 June 2017      Accepted manuscript online: 
PACS:  07.55.Ge (Magnetometers for magnetic field measurements)  
  32.80.Xx (Level crossing and optical pumping)  
  76.60.Es (Relaxation effects)  
  76.70.Hb (Optically detected magnetic resonance (ODMR))  
Fund: Project supported by the Natural Science Foundation of Shanghai (Grant No. 16ZR1402700), the National Natural Science Foundation of China (Grant No. 91636102), and the National Key Research and Development Program of China (Grant No. 2016YFA0302000).
Corresponding Authors:  Kai-Feng Zhao     E-mail:  zhaokf@fudan.edu.cn

Cite this article: 

Meng-Bing Wang(王梦冰), Da-Fa Zhao(赵大法), Gui-Ying Zhang(张桂迎), Kai-Feng Zhao(赵凯锋) Indirect pumping bell-bloom magnetometer 2017 Chin. Phys. B 26 100701

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