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Published on: August 5, 2013
Design and metrological features of microwave synthesizers for atomic fountain frequency standard
Damien Chambon1, Michel Lours, Frederic Chapelet
1Laboratoire National d'Essais-Systèmes de Référence Temps-Espace (LNE-SYRTE), CNRS-UMR8630, Observatoire de Paris, 61, Av de l'Observatoire, Paris, France.
Abstract:
In this paper we describe the improved redesign of the microwave frequency synthesizers for Laboratoire National d'Essais-Systèmes de Référence Temps-Espace (LNE-SYRTE) atomic fountains. The synthesizers use a cryogenic oscillator to generate both Cs and Rb hyperfine frequencies based on a new distribution frequency of 1 GHz. The main metrological features (phase noise, long-term phase stability, and spectral purity) of the synthesizers have been measured in situ connected to an atomic fountain and are compatible with an accuracy goal of 10(-16) for the atomic fountains. The simultaneous test of two different synthesizers on the FO2 atomic fountain at the 10(-16) level also is reported.
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