Compact Frequency Standard Based on an Intra-cavity Sample Cold Cesium Atoms

Details Compact Frequency Standard Based on an Intra-cavity Sample Cold Cesium Atoms Compact Frequency Standard Based on an Intra-cavity Sample Cold Cesium Atoms

2011-08-22

arxiv.org/abs/1108.4407v1

Physics

Atomic Physics

submitted to J. Opt. Soc. Am. B - 15 pages, 10 figures

Scientific paper

We have demonstrated the possibility for a compact frequency standard based on a sample of cold cesium atoms. In a cylindrical microwave cavity, the atoms are cooled and interrogated during a free expansion and then detected. The operation of this experiment is different from conventional atomic fountains, since all the steps are sequentially performed in the same position of space. In this paper we report the analysis of a Ramsey pattern observed to present a 47 Hz linewidth and a stability of 5x10^-13 for an integration time longer than 100s. Some of the main limitations of the standard are analyzed. This present report demonstrates considerable improvement of our previous work (S. T. Muller et al, J. Opt. Soc. Am. B, v.25, p.909, 2008) where the atoms were in a free space and not inside a microwave cavity.

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