Two-step pulse observation to improve resonance contrast for coherent population trapping atomic clock
Atomic Physics
2017-03-08 v1
Abstract
We study resonance contrast by a two-step pulse observation method to enhance the frequency stability of coherent population trapping (CPT) atomic clocks. The proposed method is a two-step Raman--Ramsey scheme with low intensity during resonance observation and high intensity after the observation. This method reduces the frequency variation in the light intensity and maintains a high signal-to-noise ratio. The resonance characteristics were calculated by density matrix analysis of a -type three-level system that was modeled on the Cs D1 line, and the characteristics were also measured using a vertical-cavity surface-emitting laser and a Cs vapor cell.
Keywords
Cite
@article{arxiv.1701.05696,
title = {Two-step pulse observation to improve resonance contrast for coherent population trapping atomic clock},
author = {Yuichiro Yano and Shigeyoshi Goka and Masatoshi Kajita},
journal= {arXiv preprint arXiv:1701.05696},
year = {2017}
}
Comments
8 pages, 9 figures