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  • Received: Apr. 12, 2015

    Accepted: Jun. 19, 2015

    Posted: Jan. 23, 2019

    Published Online: Sep. 14, 2018

    The Author Email: Rong Wei (

    DOI: 10.3788/COL201513.091201

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    Yuanbo Du, Rong Wei, Richang Dong, Fan Zou, Jinda Lin, Wenli Wang, Yuzhu Wang. Residual frequency drift in an atomic fountain clock[J]. Chinese Optics Letters, 2015, 13(9): 091201

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Chinese Optics Letters, Vol. 13, Issue 9, 091201 (2015)

Residual frequency drift in an atomic fountain clock

Yuanbo Du1,2, Rong Wei1,*, Richang Dong1,2, Fan Zou1,2, Jinda Lin1, Wenli Wang1, and Yuzhu Wang1

Author Affiliations

  • 1Key Laboratory of Quantum Optics, Center for Cold Atom Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China


We report a locking mode in which the local oscillator (LO) is locked to an atomic fountain and calibration of the residual frequency drift (RFD). In this running mode, the locked LO outputs a standard frequency signal, and a short-term fractional frequency stability of 2.7×10 13τ 1/2 is achieved. Due to the frequency drift of the LO in free running mode, a systematic frequency bias, or RFD, exists after being locked by the atomic fountain. We analyze and measure the RFD with a value of 3(2)×10 16. A sectionalized post-process method is adopted to calibrate the RFD.

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