Ultralow noise microwave generation with fiber-based optical frequency comb and application to atomic fountain clock

By J. Millo, M. Abgrall, M. Lours, E. English, Haifeng Jiang, J. Guéna, A. Clairon, Michael E. Tobar, S. Bize, Y. Coq and 1 more. 2009

170 citations recorded by the source corpus.

We demonstrate the use of a fiber-based femtosecond laser locked onto an ultrastable optical cavity to generate a low-noise microwave reference signal. Comparison with both a cryogenic sapphire oscillator (CSO) and a titanium-sapphire-based optical frequency comb system exhibit a stability of about 3×10−15 between 1 and 10 s. The microwave signal from the fiber system is used to perform Ramsey spectroscopy in a state-of-the-art cesium fountain clock. The resulting clock is compared to the CSO and exhibits a stability of 3.5×10−14τ−1/2.

Subfields: Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/05188873cccfe6070e3e3c75a2755c698dc2f639