title: Cs vapor microcells with Ne-He buffer gas mixture for high operation-temperature miniature atomic clocks.
abstract: 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.
authors.forename: E
authors.initials: E
authors.lastname: Kroemer
authors.forename: M
authors.initials: M
authors.lastname: Abdel Hafiz
authors.forename: V
authors.initials: V
authors.lastname: Maurice
authors.forename: B
authors.initials: B
authors.lastname: Fouilland
authors.forename: C
authors.initials: C
authors.lastname: Gorecki
authors.forename: R
authors.initials: R
authors.lastname: Boudot