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

doi:10.1088/0256-307X/32/9/090601

Chin. Phys. Lett.

2015, Vol. 32

Issue (09): 090601 DOI: 10.1088/0256-307X/32/9/090601

GENERAL

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

LIN Yi-Ge^1**, WANG Qiang^1,2, LI Ye^1,2, MENG Fei¹, LIN Bai-Ke^1,2, 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

Cite this article:

LIN Yi-Ge, WANG Qiang, LI Ye et al 2015 Chin. Phys. Lett. 32 090601

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Abstract

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.

Received: 31 July 2015 Published: 02 October 2015

PACS:	06.30.Ft	(Time and frequency)
	42.62.Fi	(Laser spectroscopy)
	32.70.Jz	(Line shapes, widths, and shifts)
	37.10.Jk	(Atoms in optical lattices)
	42.62.Eh	(Metrological applications; optical frequency synthesizers for precision spectroscopy)

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https://cpl.iphy.ac.cn/10.1088/0256-307X/32/9/090601 OR https://cpl.iphy.ac.cn/Y2015/V32/I09/090601

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	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

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