期刊
CHINESE PHYSICS LETTERS
卷 32, 期 9, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0256-307X/32/9/090601
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资金
- National Natural Science Foundation of China [91336212, 91436104]
An optical lattice clock based on Sr-87 is built at National Institute of Metrology (NIM) of China. The systematic frequency shifts of the clock are evaluated with a total uncertainty of 2.3x10(-16). To measure its absolute frequency with respect to NIM's cesium fountain clock NIM5, the frequency of a flywheel H-maser of NIM5 is transferred to the Sr laboratory through a 50-km-long fiber. A fiber optical frequency comb, phase-locked to the reference frequency of this H-maser, is used for the optical frequency measurement. The absolute frequency of this Sr clock is measured to be 429228004229873.7(1.4) Hz.
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