Reaching a few 10<sup>−15</sup> long-term stability of integrating sphere cold atom clock

Yaning Wang; Yanling Meng; Jinyin Wan; Ling Xiao; Mingyuan Yu; Xin Wang; Xinchuan Ouyang; Huadong Cheng; Liang Liu

doi:doi:10.3788/COL201816.070201

Chinese Optics Letters, 2018, 16 (7): 070201, Published Online: Jul. 19, 2018

Reaching a few 10⁻¹⁵ long-term stability of integrating sphere cold atom clock

Yaning Wang ^1,2Yanling Meng ¹Jinyin Wan ¹Ling Xiao ¹Mingyuan Yu ^1,2Xin Wang ^1,2Xinchuan Ouyang ^1,2Huadong Cheng ^1,*Liang Liu ^1,**

Author Affiliations

¹ Key Laboratory of Quantum Optics, The Center of Cold Atom Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

² University of Chinese Academy of Sciences, Beijing 100049, China

020.1335 Atom optics 020.3320 Laser cooling 020.7490 Zeeman effect

Abstract

We present the long-term stability of the integrating sphere cold atom clock (ISCAC) and analyze its systematic limitations. The relative frequency instability of 2.6×10 15 is reached for an averaging time of 2×105 s. The second-order Zeeman effect and the cavity pulling effect in ISCAC, which would induce the frequency drift from the clock transition, are analyzed. The analytical and experimental results indicate that the cavity pulling effect is the main contribution to the long-term frequency instability of the ISCAC. Further technical improvements to the microwave cavity are also discussed.

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Yaning Wang, Yanling Meng, Jinyin Wan, Ling Xiao, Mingyuan Yu, Xin Wang, Xinchuan Ouyang, Huadong Cheng, Liang Liu. Reaching a few 10⁻¹⁵ long-term stability of integrating sphere cold atom clock[J]. Chinese Optics Letters, 2018, 16(7): 070201.

Reaching a few 10⁻¹⁵ long-term stability of integrating sphere cold atom clock

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