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Optical detection of cold atoms without spontaneous emission

Abstract : We have demonstrated nondestructive detection of cold atoms with a probe laser by a frequency-modulation spectroscopy technique. We were able to tune the probe laser and its sidebands far from atomic resonance to reduce the spontaneous emission to less than 0.2 photon per atom during detection.
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Véronique Savalli, Gabriel Zs. Horvath, Paul D. Featonby, Laurent Cognet, Nathalie Westbrook, et al.. Optical detection of cold atoms without spontaneous emission. Optics Letters, Optical Society of America - OSA Publishing, 1999, 24 (22), pp.1552-1554. ⟨10.1364/OL.24.001552⟩. ⟨hal-00872120⟩

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