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Ca-40(+) optical frequency standards with high accuracy

文献类型：期刊论文

作者Guan Hua2,3; Huang Yao2,3; Li Cheng-Bin2,3; Gao Ke-Lin1,2,3
刊名ACTA PHYSICA SINICA
出版日期2018-08-20
卷号67期号:16页码:10
关键词optical frequency standards precision measurements Ca-40(+) ion magic wavelengths
ISSN号1000-3290
DOI10.7498/aps.67.20180876
英文摘要With the development of the technologies in the lasers and the manipulation of cold atoms, the high precision optical frequency standards have been extensively studied and built in recent years. These high precision frequency standards may play an important role in establishing the new time reference, promoting the researches in the fundamental fields, fulfilling the national strategic needs, etc. In this paper, the research progress of high accuracy Ca-40(+) optical frequency standard in Wuhan Institute of Physics and Mathematics (WIPM) of Chinese Academy of Sciences is presented. A new ULE super cavity is adopted for stabilizing the frequency of 729 nm clock laser, and the stability of the laser is improved now to 2 x 10(-15) in a duration of 1-100 s. By controlling the external fields and other environmental influences, especially suppressing the micromotion effects of the trapped ion, the uncertainty of the optical frequency standard based on a single Ca-40(+) is reduced to 5.5 x 10(-17). The stability of 5 x 10(-17) in a duration of 20000 s is achieved via the comparison between two Ca-40(+) optical frequency standards. Several precision measurement experiments are performed, based on the high precision Ca-40(+) optical frequency standard. The absolute value of the clock transition frequency of the Ca-40(+) optical frequency standard is measured second time, using an optical comb referenced to a hydrogen maser which is calibrated via GPS referenced to UTC (NIM)) using the precise point positioning data-processing technique. The frequency offset of UTC (NIM) relative to the SI second can be evaluated through BIPM circular-T reports, and the newly measured value of 4s S-2(1/2)-3d D-2(5/2) transition is adopted by CCTF-20, thus updating the recommended value of Ca-40(+) optical clock transition. Besides the absolute frequency measurement, the magic wavelengths of Ca-40(+) optical clock transition are measured precisely, and this work is a milestone for establishing all-optical trapped-ion clocks. The lifetime of the 3d D-2(3/2) and 3d (2)D(5/2 )state in Ca-40(+) are precisely measured, too. The work mentioned above contributes to the researches of the precision measurements based on cold atomic systems.
WOS关键词SR LATTICE CLOCK ; ION ; LASER ; STABILIZATION ; NM
资助项目National Natural Science Foundation of China[91336211] ; National Natural Science Foundation of China[11474318] ; National Natural Science Foundation of China[11622434] ; National Natural Science Foundation of China[11774388] ; National Basic Research Program of China[2005CB724502] ; National Basic Research Program of China[2012CB821301] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB21030100]
WOS研究方向Physics
语种英语
WOS记录号WOS:000443384900015
出版者CHINESE PHYSICAL SOC
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Basic Research Program of China ; National Basic Research Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Basic Research Program of China ; National Basic Research Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Basic Research Program of China ; National Basic Research Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Basic Research Program of China ; National Basic Research Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://ir.wipm.ac.cn/handle/112942/13080]  
专题中国科学院武汉物理与数学研究所
通讯作者Gao Ke-Lin
作者单位1.Chinese Acad Sci, Ctr Cold Atom Phys, Wuhan 430071, Hubei, Peoples R China
2.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China
3.Chinese Acad Sci, Wuhan Inst Phys & Math, Key Lab Atom Frequency Stand, Wuhan 430071, Hubei, Peoples R China
推荐引用方式
GB/T 7714		 Guan Hua,Huang Yao,Li Cheng-Bin,et al. Ca-40(+) optical frequency standards with high accuracy[J]. ACTA PHYSICA SINICA,2018,67(16):10.
APA Guan Hua,Huang Yao,Li Cheng-Bin,&Gao Ke-Lin.(2018).Ca-40(+) optical frequency standards with high accuracy.ACTA PHYSICA SINICA,67(16),10.
MLA Guan Hua,et al."Ca-40(+) optical frequency standards with high accuracy".ACTA PHYSICA SINICA 67.16(2018):10.

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来源：武汉物理与数学研究所

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