An overview of the optically detected magnetic-state-selected cesium beam clock

Chen, Sifen; Liu, Chang; Fan, Lifeng; Liu, Chen; Li, Yuanhao; Xu, Shaohang; Li, Chaojie; Wang, Yanhui

doi:10.3389/fphy.2022.963870

Front. Phys.

2022

DOI: 10.3389/fphy.2022.963870

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An overview of the optically detected magnetic-state-selected cesium beam clock

Sifen Chen

Chang Liu²,

Lifeng Fan

et al.

Abstract: Among all kinds of compact cesium beam clocks, the optically detected magnetic-state-selected cesium beam clock (OMCC) combines the advantages of the magnetic state selecting scheme and fluorescence detecting method. This paper presents an overview of the OMCC. Technical issues, noise sources, frequency shifts and improvements of OMCC are reviewed. Finally, the frequency stability of five OMCC is given, which is better than the stability of the high-performance version of Microsemi 5071A.

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Light shift suppression with pulsed light detection in magnetic-state-selected cesium beam clocks

Li¹,

Xu²,

Chen³

et al. 2022

Opt. Express

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Light detection is widely used in atomic clocks. The simple detecting structure induces the light shift which influences the clock’s long-term stability. We introduce a new method to suppress light shift by using pulsed light instead of continuous light to detect atomic states. Under a suitable pulsed sequence, the part of the atoms which do not simultaneously interact with light and microwave field are detected. We demonstrate the validity of our approach in a magnetic-state-selected cesium beam clock. Using a well-tuned sequence, the light shift coefficient is reduced by a factor of about 10, in comparison with the continuous light detection scheme. In a clock stability test with extra light power noise, the result shows good immunity of the method to laser power fluctuations. We also analyze the sources of the clock short-term stability degradation, including the Dick effect and the fact that a reduced number of atoms is detected in the pulsed detection case.

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Light shift suppression with pulsed light detection in magnetic-state-selected cesium beam clocks

Li¹,

Xu²,

Chen³

et al. 2022

Opt. Express

View full text Add to dashboard Cite

show abstract

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An overview of the optically detected magnetic-state-selected cesium beam clock

Cited by 1 publication

References 37 publications

Light shift suppression with pulsed light detection in magnetic-state-selected cesium beam clocks

Light shift suppression with pulsed light detection in magnetic-state-selected cesium beam clocks

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