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Cancellation of light-shifts in an N-resonance clock

Irina Novikova·Alexei V. Taichenachev·Valery I. Yudin·David F. Phillips·Alexander S. Zibrov·Ronald L. Walsworth
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Abstract

We demonstrate that first-order light-shifts can be cancelled for an all-optical, three-photon-absorption resonance ("N-resonance") on the D1 transition of Rb87. This light-shift cancellation enables improved frequency stability for an N-resonance clock. For example, using a table-top apparatus designed for N-resonance spectroscopy, we measured a short-term fractional frequency stability (Allan deviation) 1.5e-11 tau^(-1/2) for observation times 1s< tau < 50s. Further improvements in frequency stability should be possible with an apparatus designed as a dedicated N-resonance clock.

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Irina Novikova, Alexei V. Taichenachev, Valery I. Yudin, David F. Phillips, Alexander S. Zibrov, Ronald L. Walsworth. 2005-09-13. Cancellation of light-shifts in an N-resonance clock. https://doi.org/10.1364/ol.31.000622

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