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Chin. Phys. B, 2021, Vol. 30(8): 083202    DOI: 10.1088/1674-1056/abfccd

An effective pumping method for increasing atomic utilization in a compact cold atom clock

Xin-Chuan Ouyang(欧阳鑫川)1,2, Bo-Wen Yang(杨博文)1,2, Jian-Liao Deng(邓见辽)1, Jin-Yin Wan(万金银)1, Ling Xiao(肖玲)1, Hang-Hang Qi(亓航航)1,2, Qing-Qing Hu(胡青青)3,†, and Hua-Dong Cheng(成华东)1,2,‡
1 Key Laboratory of Quantum Optics and Center of Cold Atom Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Advanced Interdisciplinary Technology Research Center, National Innovation Institute of Defense Technology, Beijing 100010, China
Abstract  We propose a simple pumping method to increase the effective population of cold atoms in the clock state and investigate the factors which affect the pumping efficiency in cold atom systems. We report the theory and demonstrate the corresponding experiment in an 87Rb integrating sphere cold atom clock. The experimental results show that the population of cold atoms in the Zeeman sublevel |F=2, mF=0> is approximately 1.62 times that of the result using optical pumping alone. This method can also be applied to increase the effective population in any one of the target Zeeman sublevels in other cold atom systems.
Keywords:  optical pumping      Zeeman sublevels      atomic utilization  
Received:  02 March 2021      Revised:  27 April 2021      Accepted manuscript online:  29 April 2021
PACS:  32.80.Xx (Level crossing and optical pumping)  
  06.30.Ft (Time and frequency)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61727821, 61875215, and 11904408).
Corresponding Authors:  Qing-Qing Hu, Hua-Dong Cheng     E-mail:;

Cite this article: 

Xin-Chuan Ouyang(欧阳鑫川), Bo-Wen Yang(杨博文), Jian-Liao Deng(邓见辽), Jin-Yin Wan(万金银), Ling Xiao(肖玲), Hang-Hang Qi(亓航航), Qing-Qing Hu(胡青青), and Hua-Dong Cheng(成华东) An effective pumping method for increasing atomic utilization in a compact cold atom clock 2021 Chin. Phys. B 30 083202

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