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Open AccessArticle

Recent Advances Concerning the 87Sr Optical Lattice Clock at the National Time Service Center

1
Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China
2
School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(11), 2194; https://doi.org/10.3390/app8112194
Received: 27 September 2018 / Revised: 5 November 2018 / Accepted: 5 November 2018 / Published: 8 November 2018
(This article belongs to the Special Issue Quantum Optics and Quantum Information Processing 2018)
We review recent experimental progress concerning the 87Sr optical lattice clock at the National Time Service Center in China. Hertz-level spectroscopy of the 87Sr clock transition for the optical lattice clock was performed, and closed-loop operation of the optical lattice clock was realized. A fractional frequency instability of 2.8 × 10−17 was attained for an averaging time of 2000 s. The Allan deviation is found to be 1.6 × 10−151/2 and is limited mainly by white-frequency-noise. The Landé g-factors of the (5s2)1S0 and (5s5p)3P0 states in 87Sr were measured experimentally; they are important for evaluating the clock’s Zeeman shifts. We also present recent work on the miniaturization of the strontium optical lattice clock for space applications. View Full-Text
Keywords: optical clocks; strontium atoms; optical lattices; laser cooling and trapping; stability; uncertainty optical clocks; strontium atoms; optical lattices; laser cooling and trapping; stability; uncertainty
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MDPI and ACS Style

Wang, Y.; Lu, X.; Lu, B.; Kong, D.; Chang, H. Recent Advances Concerning the 87Sr Optical Lattice Clock at the National Time Service Center. Appl. Sci. 2018, 8, 2194. https://doi.org/10.3390/app8112194

AMA Style

Wang Y, Lu X, Lu B, Kong D, Chang H. Recent Advances Concerning the 87Sr Optical Lattice Clock at the National Time Service Center. Applied Sciences. 2018; 8(11):2194. https://doi.org/10.3390/app8112194

Chicago/Turabian Style

Wang, Yebing; Lu, Xiaotong; Lu, Benquan; Kong, Dehuan; Chang, Hong. 2018. "Recent Advances Concerning the 87Sr Optical Lattice Clock at the National Time Service Center" Appl. Sci. 8, no. 11: 2194. https://doi.org/10.3390/app8112194

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