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Communication Dans Un Congrès Année : 2012

Characterization of compact CPT Clocks based on a Cs-Ne microcell

Résumé

This paper reports the characterization of compact Cs CPT clocks based on a single buffer gas Cs-Ne microcell. Two different experimental set-ups are tested. The first set-up uses an externally-modulated 895 nm Distributed Feedback (DFB) laser source while the second one uses a directly-modulated custom-designed 895 nm Vertical Cavity Surface Emitting Laser (VCSEL) source. Using the DFB set-up, through reduction of the temperature-dependent collisional frequency shift and an active light shift suppression technique, a clock frequency stability of 3.8 × 10 -11 at 1 s and greatly better than 10 -11 at 60000 s is demonstrated. This proves the potential of single buffer gas Cs-Ne microfabricated cells for the development of miniature atomic clocks. Preliminar characterization of CPT resonances are reported with the VCSEL-based setup. It is expected that similar clock stability performances are achievable in this case.

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Electronique
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hal-00744649 , version 1 (26-04-2021)

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R. Boudot, X. Liu, E. Kroemer, P. Abbé, N. Passilly, et al.. Characterization of compact CPT Clocks based on a Cs-Ne microcell. European Frequency and Time Forum, Apr 2012, Gothenburg, Sweden. pp.3, ⟨10.1109/EFTF.2012.6502338⟩. ⟨hal-00744649⟩
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