A transportable optical lattice clock at the National Time Service Center

doi:10.1088/1674-1056/ab9290

中国物理B ›› 2020, Vol. 29 ›› Issue (7): 70602-070602.doi: 10.1088/1674-1056/ab9290

所属专题： SPECIAL TOPIC — Ultracold atom and its application in precision measurement

A transportable optical lattice clock at the National Time Service Center

De-Huan Kong(孔德欢), Zhi-Hui Wang(王志辉), Feng Guo(郭峰), Qiang Zhang(张强), Xiao-Tong Lu(卢晓同), Ye-Bing Wang(王叶兵), Hong Chang(常宏)

1 CAS Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Xi'an 710600, China;
2 School of Astronomy and Space Science, University of Chinese Academy of Sciences(CAS), Beijing 100049, China;
3 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China

收稿日期:2020-02-20 修回日期:2020-04-30 出版日期:2020-07-05 发布日期:2020-07-05
通讯作者: Hong Chang E-mail:changhong@ntsc.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61775220 and 11803042), the Key Research Project of Frontier Science of the Chinese Academy of Sciences (Grant No. QYZDB-SSW-JSC004), and the strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB21030100).

A transportable optical lattice clock at the National Time Service Center

De-Huan Kong(孔德欢)^1,2, Zhi-Hui Wang(王志辉)³, Feng Guo(郭峰)^1,2, Qiang Zhang(张强)^1,2, Xiao-Tong Lu(卢晓同)^1,2, Ye-Bing Wang(王叶兵)¹, Hong Chang(常宏)^1,2

1 CAS Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Xi'an 710600, China;
2 School of Astronomy and Space Science, University of Chinese Academy of Sciences(CAS), Beijing 100049, China;
3 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China

Received:2020-02-20 Revised:2020-04-30 Online:2020-07-05 Published:2020-07-05
Contact: Hong Chang E-mail:changhong@ntsc.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61775220 and 11803042), the Key Research Project of Frontier Science of the Chinese Academy of Sciences (Grant No. QYZDB-SSW-JSC004), and the strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB21030100).

摘要/Abstract

摘要： We report a transportable one-dimensional optical lattice clock based on ⁸⁷Sr at the National Time Service Center. The transportable apparatus consists of a compact vacuum system and compact optical subsystems. The vacuum system with a size of 90 cm×20 cm×42 cm and the beam distributors are assembled on a double-layer optical breadboard. The modularized optical subsystems are integrated on independent optical breadboards. By using a 230 ms clock laser pulse, spin-polarized spectroscopy with a linewidth of 4.8 Hz is obtained which is close to the 3.9 Hz Fourier-limit linewidth. The time interleaved self-comparison frequency instability is determined to be 6.3×10^-17 at an averaging time of 2000 s.

关键词: optical lattice clock, strontium atoms, spin-polarized spectra, instability

Abstract: We report a transportable one-dimensional optical lattice clock based on ⁸⁷Sr at the National Time Service Center. The transportable apparatus consists of a compact vacuum system and compact optical subsystems. The vacuum system with a size of 90 cm×20 cm×42 cm and the beam distributors are assembled on a double-layer optical breadboard. The modularized optical subsystems are integrated on independent optical breadboards. By using a 230 ms clock laser pulse, spin-polarized spectroscopy with a linewidth of 4.8 Hz is obtained which is close to the 3.9 Hz Fourier-limit linewidth. The time interleaved self-comparison frequency instability is determined to be 6.3×10^-17 at an averaging time of 2000 s.

Key words: optical lattice clock, strontium atoms, spin-polarized spectra, instability

中图分类号: (Time and frequency)

06.30.Ft

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)

孔德欢, 王志辉, 郭峰, 张强, 卢晓同, 王叶兵, 常宏. A transportable optical lattice clock at the National Time Service Center[J]. 中国物理B, 2020, 29(7): 70602-070602.

De-Huan Kong(孔德欢), Zhi-Hui Wang(王志辉), Feng Guo(郭峰), Qiang Zhang(张强), Xiao-Tong Lu(卢晓同), Ye-Bing Wang(王叶兵), Hong Chang(常宏). A transportable optical lattice clock at the National Time Service Center[J]. Chin. Phys. B, 2020, 29(7): 70602-070602.

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A transportable optical lattice clock at the National Time Service Center

A transportable optical lattice clock at the National Time Service Center

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