Pulsed Optically Pumped Rubidium Clock With High Frequency-Stability Performance
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2012/59/3/457-462
In this paper, we present the performance of a vapor-cell rubidium frequency standard working in the pulsed regime, in which the clock signal is represented by a Ramsey pattern observed on an optically detected laser absorption signal. The main experimental results agree with previously reported theoretical predictions. In particular, we measured a relative frequency stability of σ<sub>y</sub> (τ) ≈ 1.6 × 10<sup>13</sup>-τ<sup>-1/2</sup> for integration times, τ, up to 200 s, which represents a record in short-term stability for a vapor-cell clock. We also discuss the most important physical phenomena that contribute to this result.
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