First Evaluation and Frequency Measurement of the Strontium Optical Lattice Clock at NIM
LIN Yi-Ge1**, WANG Qiang1,2, LI Ye1,2, MENG Fei1, LIN Bai-Ke1,2, ZANG Er-Jun1, SUN Zhen1, FANG Fang1, LI Tian-Chu1, FANG Zhan-Jun1
1Division 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-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.
(Metrological applications; optical frequency synthesizers for precision spectroscopy)
引用本文:
. [J]. 中国物理快报, 2015, 32(09): 90601-090601.
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. First Evaluation and Frequency Measurement of the Strontium Optical Lattice Clock at NIM. Chin. Phys. Lett., 2015, 32(09): 90601-090601.
2015, Vol. 32 
