Journal
OPTICS EXPRESS
Volume 30, Issue 24, Pages 43271-43280Publisher
Optica Publishing Group
DOI: 10.1364/OE.472709
Keywords
-
Categories
Funding
- Ministry of Education of China [8091B042103]
Ask authors/readers for more resources
The study introduces a new method to suppress light shift in atomic clocks by using pulsed light instead of continuous light for atomic state detection. Experimental results demonstrate the effectiveness of this method in a magnetic-state-selected cesium beam clock, with reduced light shift coefficient and good immunity to laser power fluctuations. The study also analyzes the reasons for the degradation of clock short-term stability.
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. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available