Performance of a prototype atomic clock based on lin||lin coherent population trapping resonances in Rb atomic vapor

Details Performance of a prototype atomic clock based on lin||lin coherent population trapping resonances in Rb atomic vapor Performance of a prototype atomic clock based on lin||lin coherent population trapping resonances in Rb atomic vapor

2009-10-30

arxiv.org/abs/0910.5881v1

JOSA B, Issue 3, 27, 417-422, (2010)

Physics

Atomic Physics

6 pages, 8 fugures

Scientific paper

10.1364/JOSAB.27.000417

We report on the performance of the first table-top prototype atomic clock based on coherent population trapping (CPT) resonances with parallel linearly polarized optical fields (lin||lin configuration). Our apparatus uses a vertical cavity surface emitting laser (VCSEL) tuned to the D1 line of 87Rb with current modulation at the 87Rb hyperfine frequency. We demonstrate cancellation of the first-order light shift by proper choice of rf modulation power, and further improve our prototype clock stability by optimizing the parameters of the microwave lock loop. Operating in these optimal conditions, we measured a short-term fractional frequency stability (Allan deviation) 2*10^{-11} tau^{-1/2} for observation times 1s

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