Compact Cold-Atom Clock for Onboard Timebase: Tests in Reduced Gravity

Abstract : We present a compact atomic clock using cold rubidium atoms based on an isotropic light cooling, a Ramsey microwave interrogation, and an absorption detection. Its technology readiness level is suitable for industrial transfer. We use a fiber optical bench, based on a frequency-doubled telecom laser. The isotropic light cooling technique allows us to cool down the atoms in 100 ms and works with a cycle time of around 200 ms. We carry out measurements in simulated microgravity and obtain narrow fringes, up to 1.25 Hz.
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Mehdi Langlois, Luigi de Sarlo, David Holleville, Noel Dimarcq, Jean-François Schaff, et al.. Compact Cold-Atom Clock for Onboard Timebase: Tests in Reduced Gravity. Physical Review Applied, American Physical Society, 2018, 10 (6), pp.064007. ⟨10.1103/PhysRevApplied.10.064007⟩. ⟨hal-02050966⟩

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