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High performance vapour-cell frequency standards

Auteur(s)
Gharavipour, Mohammadreza 
Institut de physique 
Affolderbach, Christoph 
Institut de physique 
Kang, Songbai 
Institut de physique 
Bandi Nagabhushan, Thejesh 
Institut de physique 
Gruet, Florian 
Institut de physique 
Pellaton, Matthieu 
Institut de physique 
Mileti, Gaetano 
Institut de physique 
Maison d'édition
: Journal of Physics: Conference Series 723
Date de parution
2015-10-27
Nombre de page
012001
Mots-clés
  • Atomic clocks
  • Rubidium
  • vapour-cells
  • frequency standards
  • Ramsey scheme.
  • Atomic clocks

  • Rubidium

  • vapour-cells

  • frequency standards

  • Ramsey scheme.

Résumé
We report our investigations on a compact high-performance rubidium (Rb) vapour-cell clock based on microwave-optical double-resonance (DR). These studies are done in both DR continuous-wave (CW) and Ramsey schemes using the same Physics Package (PP), with the same Rb vapour cell and a magnetron-type cavity with only 45 cm3 external volume. In the CW-DR scheme, we demonstrate a DR signal with a contrast of 26% and a linewidth of 334 Hz; in Ramsey-DR mode Ramsey signals with higher contrast up to 35% and a linewidth of 160 Hz have been demonstrated. Short-term stabilities of 1.4×10^-13 τ^-1/2 and 2.4×10^-13 τ^-1/2 are measured for CW-DR and Ramsey-DR schemes, respectively. In the Ramsey-DR operation, thanks to the separation of light and microwave interactions in time, the light-shift effect has been suppressed which allows improving the long-term clock stability as compared to CW-DR operation. Implementations in miniature atomic clocks are considered.
Notes
, 2016
Nom de l'événement
8th Symposium on Frequency Standards and Metrology 2015
Lieu
Potsdam, Allemagne
Identifiants
https://libra.unine.ch/handle/123456789/25017
_
10.1088/1742-6596/723/1/012006
Autre version
http://iopscience.iop.org/article/10.1088/1742-6596/723/1/012006
Type de publication
conference paper
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