Experimental setup of NTSC SrII optical lattice clock

doi:10.1088/1674-1056/adecfd

中国物理B ›› 2026, Vol. 35 ›› Issue (2): 23702-023702.doi: 10.1088/1674-1056/adecfd

Experimental setup of NTSC SrII optical lattice clock

Feng Guo(郭峰)¹, Jia-An Li(李家安)^1,2, Yan-Yan Liu(刘艳艳)¹, Xiao-Tong Lu(卢晓同)^1,2,†, and Hong Chang(常宏)^1,2,‡

1 National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China;
2 School of Astronomy and Space Science, University of Chinese Academy of Sciences (CAS), Beijing 100049, China

收稿日期:2025-05-20 修回日期:2025-06-30 接受日期:2025-07-08 发布日期:2026-01-27
通讯作者: Xiao-Tong Lu, Hong Chang E-mail:luxiaotong@ntsc.ac.cn;changhong@ntsc.ac.cn
基金资助:
This study is supported by the Innovation Program for Quantum Science and Technology (Grant Nos. 2021ZD0300900 and 2021ZD0300902), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB35010202), and the Operation and Maintenance of Major Scientific and Technological Infrastructure of the Chinese Academy of Sciences (Grant No. 2024000014).

Experimental setup of NTSC SrII optical lattice clock

Feng Guo(郭峰)¹, Jia-An Li(李家安)^1,2, Yan-Yan Liu(刘艳艳)¹, Xiao-Tong Lu(卢晓同)^1,2,†, and Hong Chang(常宏)^1,2,‡

1 National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China;
2 School of Astronomy and Space Science, University of Chinese Academy of Sciences (CAS), Beijing 100049, China

Received:2025-05-20 Revised:2025-06-30 Accepted:2025-07-08 Published:2026-01-27
Contact: Xiao-Tong Lu, Hong Chang E-mail:luxiaotong@ntsc.ac.cn;changhong@ntsc.ac.cn
Supported by:
This study is supported by the Innovation Program for Quantum Science and Technology (Grant Nos. 2021ZD0300900 and 2021ZD0300902), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB35010202), and the Operation and Maintenance of Major Scientific and Technological Infrastructure of the Chinese Academy of Sciences (Grant No. 2024000014).

摘要/Abstract

摘要： We report the SrII optical lattice clock at the National Time Service Center (NTSC). In this system, a blackbody radiation shield with movable lattice mitigates blackbody radiation shifts through active temperature control. A shallow optical lattice with minimal tunneling minimizes AC Stark shifts. Phase-locked counter-propagating lattice beams and conductive vacuum viewports further reduce systematic uncertainties and a novel initial-state preparation method simplifies the system. Clock transition spectra achieve a linewidth of 2.5 Hz with a 400 ms clock pulse, and self-comparison stability reaches 5.1$\times10^{-16}$ at 1 s. These advancements give this clock the potential to be a critical platform for realizing outstanding systematic uncertainties in the future.

关键词: optical lattice, optical clock, strontium

Abstract: We report the SrII optical lattice clock at the National Time Service Center (NTSC). In this system, a blackbody radiation shield with movable lattice mitigates blackbody radiation shifts through active temperature control. A shallow optical lattice with minimal tunneling minimizes AC Stark shifts. Phase-locked counter-propagating lattice beams and conductive vacuum viewports further reduce systematic uncertainties and a novel initial-state preparation method simplifies the system. Clock transition spectra achieve a linewidth of 2.5 Hz with a 400 ms clock pulse, and self-comparison stability reaches 5.1$\times10^{-16}$ at 1 s. These advancements give this clock the potential to be a critical platform for realizing outstanding systematic uncertainties in the future.

Key words: optical lattice, optical clock, strontium

中图分类号: (Atoms in optical lattices)

37.10.Jk

32.70.Jz (Line shapes, widths, and shifts) 06.30.Ft (Time and frequency) 42.62.Eh (Metrological applications; optical frequency synthesizers for precision spectroscopy)

Feng Guo(郭峰), Jia-An Li(李家安), Yan-Yan Liu(刘艳艳), Xiao-Tong Lu(卢晓同), and Hong Chang(常宏). Experimental setup of NTSC SrII optical lattice clock[J]. 中国物理B, 2026, 35(2): 23702-023702.

Feng Guo(郭峰), Jia-An Li(李家安), Yan-Yan Liu(刘艳艳), Xiao-Tong Lu(卢晓同), and Hong Chang(常宏). Experimental setup of NTSC SrII optical lattice clock[J]. Chin. Phys. B, 2026, 35(2): 23702-023702.

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Experimental setup of NTSC SrII optical lattice clock

Experimental setup of NTSC SrII optical lattice clock

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