Recent improvements on the atomic fountain clock at SIOM

doi:10.1088/1674-1056/24/7/070601

中国物理B ›› 2015, Vol. 24 ›› Issue (7): 70601-070601.doi: 10.1088/1674-1056/24/7/070601

Recent improvements on the atomic fountain clock at SIOM

杜远博^{a b}, 魏荣^a, 董日昌^{a b}, 邹凡^{a b}, 王育竹^a

a Key Laboratory of Quantum Optics and Center for Cold Atom Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
b University of Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2014-10-29 修回日期:2015-02-05 出版日期:2015-07-05 发布日期:2015-07-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61275204 and 91336105).

Recent improvements on the atomic fountain clock at SIOM

Du Yuan-Bo (杜远博)^{a b}, Wei Rong (魏荣)^a, Dong Ri-Chang (董日昌)^{a b}, Zou Fan (邹凡)^{a b}, Wang Yu-Zhu (王育竹)^a

a Key Laboratory of Quantum Optics and Center for Cold Atom Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
b University of Chinese Academy of Sciences, Beijing 100049, China

Received:2014-10-29 Revised:2015-02-05 Online:2015-07-05 Published:2015-07-05
Contact: Wei Rong E-mail:weirong@siom.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61275204 and 91336105).

摘要/Abstract

摘要： We report the recent advance in our rubidium atomic fountain clock (AFC). The parameters of the Ramsey cavity are optimized by balancing the coupling from the two ports. The temperature control system of the Ramsey interaction region is renovated, and the resonant temperature of the Ramsey cavity is regulated to be slightly above the room temperature. The quality of magnetic environment in the Ramsey interaction region is also improved. A new digital-to-analog converter (DAC) circuit that controls the local oscillator is adopted to decrease the noise of the oven-controlled crystal oscillator output. As a result, the short-term fractional frequency stability of 2.7 ×10^-13τ^-1/2 and the long-term fractional frequency stability of 1.6 ×10^-15 at the average time of 32800 s are achieved.

关键词: atomic fountain clock, Ramsey cavity, frequency stability

Abstract: We report the recent advance in our rubidium atomic fountain clock (AFC). The parameters of the Ramsey cavity are optimized by balancing the coupling from the two ports. The temperature control system of the Ramsey interaction region is renovated, and the resonant temperature of the Ramsey cavity is regulated to be slightly above the room temperature. The quality of magnetic environment in the Ramsey interaction region is also improved. A new digital-to-analog converter (DAC) circuit that controls the local oscillator is adopted to decrease the noise of the oven-controlled crystal oscillator output. As a result, the short-term fractional frequency stability of 2.7 ×10^-13τ^-1/2 and the long-term fractional frequency stability of 1.6 ×10^-15 at the average time of 32800 s are achieved.

Key words: atomic fountain clock, Ramsey cavity, frequency stability

中图分类号: (Time and frequency)

06.30.Ft

42.50.-p (Quantum optics) 32.30.-r (Atomic spectra?)

杜远博, 魏荣, 董日昌, 邹凡, 王育竹. Recent improvements on the atomic fountain clock at SIOM[J]. 中国物理B, 2015, 24(7): 70601-070601.

Du Yuan-Bo (杜远博), Wei Rong (魏荣), Dong Ri-Chang (董日昌), Zou Fan (邹凡), Wang Yu-Zhu (王育竹). Recent improvements on the atomic fountain clock at SIOM[J]. Chin. Phys. B, 2015, 24(7): 70601-070601.

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Recent improvements on the atomic fountain clock at SIOM

Recent improvements on the atomic fountain clock at SIOM

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