Precision frequency measurement of 1S0-3P1 intercombination lines of Sr isotopes

doi:10.1088/1674-1056/24/1/013201

›› 2015, Vol. 24 ›› Issue (1): 13201-013201.doi: 10.1088/1674-1056/24/1/013201

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Precision frequency measurement of ¹S₀-³P₁ intercombination lines of Sr isotopes

刘辉^{a b}, 高峰^a, 王叶兵^a, 田晓^{a b}, 任洁^a, 卢本全^{a b}, 徐琴芳^a, 谢玉林^{a b}, 常宏^a

a CAS Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Xi'an 710600, China;
b University of Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2014-06-19 修回日期:2014-08-08 出版日期:2015-01-05 发布日期:2015-01-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 61127901) and the Key Project of the Chinese Academy of Sciences (Grant No. KJZD-EW-W02).

Precision frequency measurement of ¹S₀-³P₁ intercombination lines of Sr isotopes

Liu Hui (刘辉)^{a b}, Gao Feng (高峰)^a, Wang Ye-Bing (王叶兵)^a, Tian Xiao (田晓)^{a b}, Ren Jie (任洁)^a, Lu Ben-Quan (卢本全)^{a b}, Xu Qin-Fang (徐琴芳)^a, Xie Yu-Lin (谢玉林)^{a b}, Chang Hong (常宏)^a

a CAS Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Xi'an 710600, China;
b University of Chinese Academy of Sciences, Beijing 100049, China

Received:2014-06-19 Revised:2014-08-08 Online:2015-01-05 Published:2015-01-05
Contact: Chang Hong E-mail:changhong@ntsc.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 61127901) and the Key Project of the Chinese Academy of Sciences (Grant No. KJZD-EW-W02).

摘要/Abstract

摘要： We report on frequency measurement of the intercombination (5s²)¹S₀-(5s5p)³P₁ transition of the four natural isotopes of strontium, including ⁸⁸Sr (82.58%), ⁸⁷Sr (7.0%), ⁸⁶Sr (9.86%), and ⁸⁴Sr (0.56%). A narrow-linewidth laser that is locked to an ultra-low expansion (ULE) optical cavity with a finesse of 12000 is evaluated at a linewidth of 200 Hz with a fractional frequency drift of 2.8× 10^-13 at an integration time of 1 s. The fluorescence collector and detector are specially designed, based on a thermal atomic beam. Using a double-pass acousto-optic modulator (AOM) combined with a fiber and laser power stabilization configuration to detune the laser frequency enables high signal-to-noise ratios and precision saturated spectra to be obtained for the six transition lines, which allows us to determine the transition frequency precisely. The optical frequency is measured using an optical frequency synthesizer referenced to an H maser. Both the statistical values and the final values, including the corrections and uncertainties, are derived for a comparison with the values given in other works.

关键词: optical frequency measurement, strontium, intercombination transition

Abstract: We report on frequency measurement of the intercombination (5s²)¹S₀-(5s5p)³P₁ transition of the four natural isotopes of strontium, including ⁸⁸Sr (82.58%), ⁸⁷Sr (7.0%), ⁸⁶Sr (9.86%), and ⁸⁴Sr (0.56%). A narrow-linewidth laser that is locked to an ultra-low expansion (ULE) optical cavity with a finesse of 12000 is evaluated at a linewidth of 200 Hz with a fractional frequency drift of 2.8× 10^-13 at an integration time of 1 s. The fluorescence collector and detector are specially designed, based on a thermal atomic beam. Using a double-pass acousto-optic modulator (AOM) combined with a fiber and laser power stabilization configuration to detune the laser frequency enables high signal-to-noise ratios and precision saturated spectra to be obtained for the six transition lines, which allows us to determine the transition frequency precisely. The optical frequency is measured using an optical frequency synthesizer referenced to an H maser. Both the statistical values and the final values, including the corrections and uncertainties, are derived for a comparison with the values given in other works.

Key words: optical frequency measurement, strontium, intercombination transition

中图分类号: (Visible and ultraviolet spectra)

32.30.Jc

06.30.Ft (Time and frequency) 42.62.Fi (Laser spectroscopy)

刘辉, 高峰, 王叶兵, 田晓, 任洁, 卢本全, 徐琴芳, 谢玉林, 常宏. Precision frequency measurement of ¹S₀-³P₁ intercombination lines of Sr isotopes[J]. , 2015, 24(1): 13201-013201.

Liu Hui (刘辉), Gao Feng (高峰), Wang Ye-Bing (王叶兵), Tian Xiao (田晓), Ren Jie (任洁), Lu Ben-Quan (卢本全), Xu Qin-Fang (徐琴芳), Xie Yu-Lin (谢玉林), Chang Hong (常宏). Precision frequency measurement of ¹S₀-³P₁ intercombination lines of Sr isotopes[J]. Chin. Phys. B, 2015, 24(1): 13201-013201.

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Precision frequency measurement of ¹S₀-³P₁ intercombination lines of Sr isotopes

Precision frequency measurement of ¹S₀-³P₁ intercombination lines of Sr isotopes

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