Dependence of the 85Rb coherent population trapping resonance characteristic on the pressure of N2 buffer gas

doi:10.1088/1674-1056/22/9/099501

Abstract In order to exploit its potential applications, we experimentally study the dependence of ⁸⁵Rb-based coherent population trapping (CPT) resonance on N₂ buffer gas with 6 vapor cells filled with natural rubidium and N₂. The experiments are carried out at different pressures and temperatures, and the results reveal that higher cell temperature makes the resonance more sensitive to N₂ pressure. Thus, it is important to choose a proper buffer gas pressure at a given cell temperature. This work provides valuable data for the application of ⁸⁵Rb CPT resonance with a buffer gas of N₂.

Keywords: coherent population trapping (CPT) buffer gas atomic clock

Received: 24 December 2012
Revised: 05 March 2013
Accepted manuscript online:

PACS:	95.55.Sh	(Auxiliary and recording instruments; clocks and frequency standards)
	34.80.Bm	(Elastic scattering)
	32.70.Jz	(Line shapes, widths, and shifts)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10927403).

Corresponding Authors: Zhang Yi
E-mail: zhangyi@wipm.ac.cn

Cite this article:

Qu Su-Ping (屈苏平), Zhang Yi (张奕), Gu Si-Hong (顾思洪) Dependence of the ⁸⁵Rb coherent population trapping resonance characteristic on the pressure of N₂ buffer gas 2013 Chin. Phys. B 22 099501

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Dependence of the 85Rb coherent population trapping resonance characteristic on the pressure of N2 buffer gas

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Dependence of the ⁸⁵Rb coherent population trapping resonance characteristic on the pressure of N₂ buffer gas