Strontium optical lattice clock at the National Time Service Center

We report the 87Sr optical lattice clock developed at the National Time Service Center. We achieved a closed-loop operation of the optical lattice clock based on 87Sr atoms. The linewidth of the spin-polarized clock peak is 3.9 Hz with a clock laser pulse length of 300 ms, which corresponds to a Fou...

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Bibliographic Details
Published inChinese physics B Vol. 27; no. 2; pp. 204 - 209
Main Author 王叶兵;尹默娟;任洁;徐琴芳;卢本全;韩建新;郭阳;常宏
Format Journal Article
LanguageEnglish
Published 01.02.2018
Subjects
平均时间;服务中心;格子;Fourier;不稳定性;锶;白噪音;频率差
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Summary:We report the 87Sr optical lattice clock developed at the National Time Service Center. We achieved a closed-loop operation of the optical lattice clock based on 87Sr atoms. The linewidth of the spin-polarized clock peak is 3.9 Hz with a clock laser pulse length of 300 ms, which corresponds to a Fourier-limited linewidth of 3 Hz. The fitting of the in-loop error signal data shows that the instability is approximately 5 × 10 15τ-1/2, affected primarily by the white noise. The fractional frequency difference averages down to 5.7 × 10 ^-17 for an averaging time of 3000 s.
Bibliography:Ye-Bing Wang1,2 Mo-Juan Yin1, Jie Ren1, Qin-Fang Xu Ben-Ouan Lu Jian-Xin Han, Yang Gu and Hong Chang （1CAS Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Xi＇ an 710600, China 2 University of Chinese Academy of Sciences （CAS）, Beijing 100049, China）
optical clock, optical lattice, strontium atoms, stability
We report the 87Sr optical lattice clock developed at the National Time Service Center. We achieved a closed-loop operation of the optical lattice clock based on 87Sr atoms. The linewidth of the spin-polarized clock peak is 3.9 Hz with a clock laser pulse length of 300 ms, which corresponds to a Fourier-limited linewidth of 3 Hz. The fitting of the in-loop error signal data shows that the instability is approximately 5 × 10 15τ-1/2, affected primarily by the white noise. The fractional frequency difference averages down to 5.7 × 10 ^-17 for an averaging time of 3000 s.
11-5639/O4
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/27/2/023701