Theoretical analysis of suppressing Dick effect in Ramsey-CPT atomic clock by interleaving lock

doi:10.1088/1674-1056/27/2/023101

中国物理B ›› 2018, Vol. 27 ›› Issue (2): 23101-023101.doi: 10.1088/1674-1056/27/2/023101

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Theoretical analysis of suppressing Dick effect in Ramsey-CPT atomic clock by interleaving lock

Xiao-Lin Sun(孙晓林), Jian-Wei Zhang(张建伟), Peng-Fei Cheng(程鹏飞), Ya-Ni Zuo(左娅妮), Li-Jun Wang(王力军)

1. State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, China;
2. Department of Physics, Tsinghua University, Beijing 100084, China;
3. Department of Precision Instruments, Tsinghua University, Beijing 100084, China

收稿日期:2017-08-29 修回日期:2017-11-14 出版日期:2018-02-05 发布日期:2018-02-05
通讯作者: Jian-Wei Zhang E-mail:zhangjw@tsinghua.edu.cn
基金资助:
Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0302101) and the Initiative Program of State Key Laboratory of Precision Measurement Technology and Instruments.

Theoretical analysis of suppressing Dick effect in Ramsey-CPT atomic clock by interleaving lock

Xiao-Lin Sun(孙晓林)^1,2, Jian-Wei Zhang(张建伟)^1,3, Peng-Fei Cheng(程鹏飞)^1,2, Ya-Ni Zuo(左娅妮)^1,2, Li-Jun Wang(王力军)^1,2,3

1. State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, China;
2. Department of Physics, Tsinghua University, Beijing 100084, China;
3. Department of Precision Instruments, Tsinghua University, Beijing 100084, China

Received:2017-08-29 Revised:2017-11-14 Online:2018-02-05 Published:2018-02-05
Contact: Jian-Wei Zhang E-mail:zhangjw@tsinghua.edu.cn
About author:31.15.-p; 42.50.Gy; 95.55.Sh
Supported by:
Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0302101) and the Initiative Program of State Key Laboratory of Precision Measurement Technology and Instruments.

摘要/Abstract

摘要： For most pulsed atomic clocks, the Dick effect is one of the main limits to reach its frequency stability limitation due to quantum projection noise. In this paper, we measure the phase noise of the local oscillator in the Ramsey-CPT atomic clock and calculate the Dick effect induced Allan deviation based on a three-level atomic model, which is quite different from typical atomic clocks. We further present a detailed analysis of optimizing the sensitivity function and minimizing the Dick effect by interleaving lock. By optimizing the duty circle of laser pulses, average time during detection and optical intensity of laser beam, the Dick effect induced Allan deviation can be reduced to the level of 10^-14.

关键词: coherent population trapping, Dick effect, atomic clock

Abstract: For most pulsed atomic clocks, the Dick effect is one of the main limits to reach its frequency stability limitation due to quantum projection noise. In this paper, we measure the phase noise of the local oscillator in the Ramsey-CPT atomic clock and calculate the Dick effect induced Allan deviation based on a three-level atomic model, which is quite different from typical atomic clocks. We further present a detailed analysis of optimizing the sensitivity function and minimizing the Dick effect by interleaving lock. By optimizing the duty circle of laser pulses, average time during detection and optical intensity of laser beam, the Dick effect induced Allan deviation can be reduced to the level of 10^-14.

Key words: coherent population trapping, Dick effect, atomic clock

中图分类号: (Calculations and mathematical techniques in atomic and molecular physics)

31.15.-p

42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption) 95.55.Sh (Auxiliary and recording instruments; clocks and frequency standards)

孙晓林, 张建伟, 程鹏飞, 左娅妮, 王力军. Theoretical analysis of suppressing Dick effect in Ramsey-CPT atomic clock by interleaving lock[J]. 中国物理B, 2018, 27(2): 23101-023101.

Xiao-Lin Sun(孙晓林), Jian-Wei Zhang(张建伟), Peng-Fei Cheng(程鹏飞), Ya-Ni Zuo(左娅妮), Li-Jun Wang(王力军). Theoretical analysis of suppressing Dick effect in Ramsey-CPT atomic clock by interleaving lock[J]. Chin. Phys. B, 2018, 27(2): 23101-023101.

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Theoretical analysis of suppressing Dick effect in Ramsey-CPT atomic clock by interleaving lock

Theoretical analysis of suppressing Dick effect in Ramsey-CPT atomic clock by interleaving lock

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