Title :
Dick effect and cavity pulling on HORACE compact cold atom clock
Author :
Rossetto, N. ; Esnault, F.X. ; Holleville, D. ; Delporte, J. ; Lours, M. ; Dimarcq, N.
Author_Institution :
SYRTE, Obs. de Paris, Paris, France
Abstract :
HORACE is a compact cold caesium (Cs) atom clock using isotropic light cooling technique directly inside the spherical microwave cavity. It has been designed for onboard and space applications. Ultimate stability as low as 2.2 10-13 τ-1/2 had been demonstrated, limited by atomic shot noise and quantum projection noise. Influence of Dick effect has been studied and a compact and simple frequency synthesizer using off the shelf quartz has been realized and characterized. As atoms remain in the cavity during Ramsey sequence, long term stability evaluation focused on cavity pulling effect. This proceeding presents both the microwave synthesizer development and cavity pulling study using a tricky technique to tune the microwave cavity.
Keywords :
atomic clocks; caesium; frequency stability; frequency synthesizers; laser cooling; microcavity lasers; quantum noise; shot noise; Cs; Dick effect; HORACE; Ramsey sequence; atom clock; atomic shot noise; cavity pulling; compact cold caesium; frequency synthesizer; isotropic light cooling technique; microwave synthesizer; quantum projection noise; shelf quartz; spherical microwave cavity; stability; Atomic clocks; Cavity resonators; Microwave oscillators; Microwave theory and techniques; Stability analysis; Synthesizers;
Conference_Titel :
Frequency Control and the European Frequency and Time Forum (FCS), 2011 Joint Conference of the IEEE International
Conference_Location :
San Fransisco, CA
Print_ISBN :
978-1-61284-111-3
DOI :
10.1109/FCS.2011.5977902
