Abstract

We propose and demonstrate a mode-locked laser-type optical atomic clock with an optically pumped cesium (Cs) gas cell. By adopting the optically pumped Cs gas cell with a double resonance method as a frequency standard, we have successfully demonstrated an ultrastable rack-mount type Cs optical atomic clock with excellent short-term stability. The obtained frequency stabilities reached as high as $1.2\times {10}^{-12}$ for $\tau =1\mathrm{s}$ and $8.8\times {10}^{-14}$ for $\tau =100\mathrm{s}$ for a $9.1926\mathrm{GHz}$ microwave output signal.

© 2007 Optical Society of America

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