From atomic fountains to ultra-stable lasers
- Fang, B.
- Goff, H. Le
- Chupin, B.
- Lorini, L.
- Abgrall, M.
- Blondé, P.
- Rovera, D.
- Tuckey, P.
- Uhrich, P.
- Achkar, J.
- Guéna, J.
- Zhang, S.
- Tagart, R. Le
- Coq, Y. Le
- Bize, S.
- Alvarez-Martinez, H.
- Galland, N.
- Seidelin, S.
- Ferrier, A.
- Goldner, P.
DOIAbstract
The SI second is currently defined through the ground-state hyperfine transition frequency of the cesium atom. We discuss the calibration of international time scales using one of the primary frequency standards at LNE-SYRTE. However, the future of time and frequency metrology lies in the optical domain. We describe our ongoing research on laser spectroscopy for ultra-stable lasers which will eventually enable the ultimate performance in optical clocks
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