期刊
CHINESE PHYSICS B
卷 27, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/27/2/023701
关键词
optical clock; optical lattice; strontium atoms; stability
资金
- National Natural Science Foundation of China [11474282, 61775220]
- Key Research Project of Frontier Science of the Chinese Academy of Sciences [QYZDB-SSW-JSC004]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB21030700]
We report the Sr-87 optical lattice clock developed at the National Time Service Center. We achieved a closed-loop operation of the optical lattice clock based on Sr-87 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 x 10(-15)tau(-1/2), affected primarily by the white noise. The fractional frequency difference averages down to 5.7 x 10(-17) for an averaging time of 3000 s.
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