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

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.

scholarly journals Recent Advances Concerning the 87Sr Optical Lattice Clock at the National Time Service Center

2018 ◽  
Vol 8 (11) ◽  
pp. 2194 ◽  
Author(s):  
Yebing Wang ◽  
Xiaotong Lu ◽  
Benquan Lu ◽  
Dehuan Kong ◽  
Hong Chang
Keyword(s):  
Optical Lattice ◽  
Closed Loop ◽  
Frequency Instability ◽  
Frequency Noise ◽  
Allan Deviation ◽  
Service Center ◽  
Space Applications ◽  
Time Service ◽  
Optical Lattice Clock ◽  
Averaging Time

We review recent experimental progress concerning the 87Sr optical lattice clock at the National Time Service Center in China. Hertz-level spectroscopy of the 87Sr clock transition for the optical lattice clock was performed, and closed-loop operation of the optical lattice clock was realized. A fractional frequency instability of 2.8 × 10−17 was attained for an averaging time of 2000 s. The Allan deviation is found to be 1.6 × 10−15/τ1/2 and is limited mainly by white-frequency-noise. The Landé g-factors of the (5s2)1S0 and (5s5p)3P0 states in 87Sr were measured experimentally; they are important for evaluating the clock’s Zeeman shifts. We also present recent work on the miniaturization of the strontium optical lattice clock for space applications.

A transportable optical lattice clock at the National Time Service Center

2020 ◽  
Vol 29 (7) ◽  
pp. 070602 ◽  
Author(s):  
De-Huan Kong ◽  
Zhi-Hui Wang ◽  
Feng Guo ◽  
Qiang Zhang ◽  
Xiao-Tong Lu ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Service Center ◽  
Time Service ◽  
Optical Lattice Clock

Closed-Loop Operation of Optical Lattice Clock at National Time Service Center

2018 ◽  
Author(s):  
Xu Qin-Fang ◽  
Yin Mo-Juan ◽  
Wang Ye-Bing ◽  
Ren Jie ◽  
Guo Yang ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Closed Loop ◽  
Service Center ◽  
Time Service ◽  
Optical Lattice Clock

scholarly journals Spin–orbit-coupled fermions in an optical lattice clock

Nature ◽  
2016 ◽  
Vol 542 (7639) ◽  
pp. 66-70 ◽  
Author(s):  
S. Kolkowitz ◽  
S. L. Bromley ◽  
T. Bothwell ◽  
M. L. Wall ◽  
G. E. Marti ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Spin Orbit ◽  
Optical Lattice Clock

scholarly journals Characterization and Suppression of Background Light Shifts in an Optical Lattice Clock

2021 ◽  
Vol 15 (4) ◽  
Author(s):  
R.J. Fasano ◽  
Y.J. Chen ◽  
W.F. McGrew ◽  
W.J. Brand ◽  
R.W. Fox ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Background Light ◽  
Optical Lattice Clock ◽  
Light Shifts

Optical Lattice Clock

MAPAN ◽  
2012 ◽  
Vol 27 (1) ◽  
pp. 9-12
Author(s):  
Tetsuya Ido
Keyword(s):  
Optical Lattice ◽  
Optical Lattice Clock
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