The pulsed optically pumped Rb frequency standards in National Time Service Center

2012 ◽  
Author(s):  
Du Zhi-jing ◽  
Zhang Shou-gang ◽  
Liu Jie ◽  
Li Xiao-feng ◽  
Liu Dan-dan ◽  
...  
Keyword(s):  
Service Center ◽  
Optically Pumped ◽  
Time Service ◽  
Frequency Standards

Development of the strontium optical lattice clock at national time service center

2018 ◽  
Author(s):  
Mojuan Yin ◽  
Qinfang Xu ◽  
Yebing Wang ◽  
Jie Ren ◽  
Yang Guo ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Service Center ◽  
Time Service ◽  
Optical Lattice Clock

Comparison of Two-Way and BeiDou Common View Time Transfer between NTSC and BEIJ Station

2014 ◽  
Vol 1049-1050 ◽  
pp. 1997-2000 ◽  
Author(s):  
Hong Zhang ◽  
Min Yan ◽  
Wei Guang
Keyword(s):  
Data Analysis ◽  
Service Center ◽  
Time Transfer ◽  
Time Service ◽  
Common View ◽  
High Agreement ◽  
Frequency Transfer

The data obtained by the two-way satellite time and frequency transfer (TWSTFT) and the BeiDou common view (BDCV) experiments between the National Time Service Center (NTSC) and Beijing station (BEIJ) will be compared in this paper. Results with high agreement between the two techniques will be described. Data analysis results demonstrated that the two-way satellite time and frequency transfer (TWSTFT) and the BeiDou common view (BDCV) can back up each other.

scholarly journals Light-shift suppression in laser optically pumped vapour-cell atomic frequency standards

2005 ◽  
Vol 80 (7) ◽  
pp. 841-848 ◽  
Author(s):  
C. Affolderbach ◽  
C. Andreeva ◽  
S. Cartaleva ◽  
T. Karaulanov ◽  
G. Mileti ◽  
...  
Keyword(s):  
Light Shift ◽  
Optically Pumped ◽  
Frequency Standards ◽  
Atomic Frequency

Strontium optical lattice clock at the National Time Service Center

2018 ◽  
Vol 27 (2) ◽  
pp. 023701 ◽  
Author(s):  
Ye-Bing Wang ◽  
Mo-Juan Yin ◽  
Jie Ren ◽  
Qin-Fang Xu ◽  
Ben-Quan Lu ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Service Center ◽  
Time Service ◽  
Optical Lattice Clock

scholarly journals An Evaluation of the Zeeman Shift of the 87Sr Optical Lattice Clock at the National Time Service Center

2020 ◽  
Vol 10 (4) ◽  
pp. 1440 ◽  
Author(s):  
Xiaotong Lu ◽  
Mojuan Yin ◽  
Ting Li ◽  
Yebing Wang ◽  
Hong Chang
Keyword(s):  
Magnetic Field ◽  
Optical Lattice ◽  
Average Frequency ◽  
Service Center ◽  
Time Service ◽  
First Order ◽  
Zeeman Shift ◽  
Frequency Correction ◽  
Overall Evaluation ◽  
Optical Lattice Clock

The Zeeman shift plays an important role in the evaluation of optical lattice clocks since a strong bias magnetic field is applied for departing Zeeman sublevels and defining a quantization axis. We demonstrated the frequency correction and uncertainty evaluation due to Zeeman shift in the 87Sr optical lattice clock at the National Time Service Center. The first-order Zeeman shift was almost completely removed by stabilizing the clock laser to the average frequency of the two Zeeman components of mF = ±9/2. The residual first-order Zeeman shift arose from the magnetic field drift between measurements of the two stretched-state center frequencies; the upper bound was inferred as 4(5) × 10−18. The quadratic Zeeman shift coefficient was experimentally determined as –23.0(4) MHz/T2 and the final Zeeman shift was evaluated as 9.20(7) × 10−17. The evaluation of the Zeeman shift is a foundation for overall evaluation of the uncertainty of an optical lattice clock. This measurement can provide more references for the determination of the quadratic coefficient of 87Sr.

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