D. Chambon

TL;DR: The link is used to compare the microwave reference and a CO2/OsO4 frequency standard that stabilizes a femtosecond laser frequency comb, demonstrating a resolution higher than the stability of the best microwave or optical clocks.

TL;DR: Several recent improvements of the BNM-SYRTE fountain ensemble are described, including a new microwave synthesis scheme based on a fully operational cryogenic oscillator and a thorough investigation of some cold collision properties of 133Cs.

Abstract: In this article, we describe a new frequency synthesis system that includes a low phase noise cryogenic sapphire oscillator (CSO) and an H-maser to provide metrological low-noise signals to time and frequency experiments. Implementing this system as a local oscillator for a Cs cold atom fountain, a record frequency stability of 1.6×10−14τ−1∕2 is obtained.

TL;DR: In this article, an atom interferometer for inertial sensing in microgravity is presented, as part of the I.C.E. (Interferometrie Coherente pour l'Espace) collaboration.

TL;DR: The improved redesign of the microwave frequency synthesizers for Laboratoire National d'Essais-Systemes de Reference Temps-Espace (LNE-SYRTE) atomic fountains uses a cryogenic oscillator to generate both Cs and Rb hyperfine frequencies based on a new distribution frequency of 1 GHz.