Open AccessCs vapor microcells with Ne-He buffer gas mixture for high operation-temperature miniature atomic clocks
Author(s) -
Eric Kroemer,
Moustafa Abdel Hafiz,
Vincent Maurice,
B Fouilland,
Christophe Gorecki,
Rodolphe Boudot
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.018373
Subject(s) - buffer gas , buffer (optical fiber) , inversion temperature , atomic clock , trapping , materials science , spectroscopy , optics , analytical chemistry (journal) , chemistry , physics , electrical engineering , laser , ecology , atmospheric sciences , quantum mechanics , chromatography , daytime , biology , engineering
We report on the characterization of Cs vapor microfabricated cells filled with a Ne-He buffer gas mixture using coherent population trapping (CPT) spectroscopy. The temperature dependence of the Cs clock frequency is found to be canceled at the first order around a so-called inversion temperature higher than 80°C whose value depends on the buffer gas partial pressure ratio. This buffer gas mixture could be well-adapted for the development of miniature atomic clocks devoted to be used in specific applications such as defense and avionic systems with high operating temperature environment (typically higher than 85°C). This solution suggests an alternative to buffer gas mixtures generally used in optically-pumped vapor cell atomic clocks.