First Evaluation and Frequency Measurement of the Strontium Optical Lattice Clock at NIM

An optical lattice clock based on 87Sr is built at National Institute of Metrology （NIM） of China. The systematic frequency shifts of the clock are evaluated with a total uncertainty of 2.3×10-16. To measure its absolute frequency with respect to NIM＇s cesium fountain clock NIM5, the frequency of a...

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Published inChinese physics letters Vol. 32; no. 9; pp. 17 - 20
Main Author 林弋戈 王强 李烨 孟飞 林百科 臧二军 孙震 房芳 李天初 方占军
Format Journal Article
LanguageEnglish
Published 01.09.2015
Subjects
Clocks
Flywheels
Frequency measurement
Frequency shift
Metrology
Optical fibers
Optical lattices
Strontium
不确定度评定
中国计量科学研究院
光晶格
光纤传输
评估
铯原子喷泉钟
锶
频率测量
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ISSN0256-307X
1741-3540
DOI10.1088/0256-307x/32/9/090601

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Summary:An optical lattice clock based on 87Sr is built at National Institute of Metrology （NIM） of China. The systematic frequency shifts of the clock are evaluated with a total uncertainty of 2.3×10-16. 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-kin-long fiber. reference frequency of this H-maser, is used for the optical this Sr clock is measured to be 429228004229873.7（1.4）Hz. A fiber optical frequency comb, phase-locked to the frequency measurement. The absolute frequency of
Bibliography:11-1959/O4
LIN Yi-Ge, WANG Qiang, LI Ye, MENG Fei, LIN Bai-Ke, ZANG Er-Jun, SUN Zhen, FANG Fang, LI Tian-Chu, FANG Zhan-Jun（ 1 Division of Time and Frequency, National Institute of Metrology （NIM）, Beijing 100013 2Department of Precision Instrument, Tsinghua University, Beijing 100084）
An optical lattice clock based on 87Sr is built at National Institute of Metrology （NIM） of China. The systematic frequency shifts of the clock are evaluated with a total uncertainty of 2.3×10-16. 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-kin-long fiber. reference frequency of this H-maser, is used for the optical this Sr clock is measured to be 429228004229873.7（1.4）Hz. A fiber optical frequency comb, phase-locked to the frequency measurement. The absolute frequency of
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307x/32/9/090601