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Pulsed optically pumped rubidium clock with high frequency-stability performance

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6 Author(s)
Micalizio, S. ; Ist. Naz. di Ricerca Metrol. (INRIM), Torino, Italy ; Godone, A. ; Calosso, C. ; Levi, F.
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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 σy(τ) ≈ 1.6 × 10-13τ-1/2 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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Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:59 ,  Issue: 3 )