Atomic Frequency standards Based on Pulsed Coherent Light Storage

Details Atomic Frequency standards Based on Pulsed Coherent Light Storage Atomic Frequency standards Based on Pulsed Coherent Light Storage

2008-10-03

arxiv.org/abs/0810.0623v1

Physics

Atomic Physics

6 pages, 5 figures

Scientific paper

10.1103/PhysRevA.79.063820

We propose a new scheme of microwave frequency standards based on pulsed coherent optical information storage. Unlike the usual frequency reference where the Ramsey fringe is printed on the population of a certain state, we print the Ramsey fringe on the coherence. Then the coherence is detected in the form of a retrieval light. The central line of the Ramsey fringe can be used as a frequency reference in an absorption-cell-based atomic frequency standard. This scheme is free of light shifts as the interrogating process is separated from the optical pumping processes, and the cavity pulling effect is negligible due to the low Q requirement. Encoding the Ramsey interference into the retrieval light pulse has the merit of high signal to noise ratio and the estimated frequency stability of shot noise limit is about $2\times10^{-14}$ in 1 second, this scheme is promising for building small, compact and stable atomic frequency standards.

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