J. Phys. II France
Volume 6, Numéro 8, August 1996
Page(s) 1133 - 1151
DOI: 10.1051/jp2:1996121
J. Phys. II France 6 (1996) 1133-1151

Transverse Effects on Squeezing with Atoms

Astrid Lambrecht, Jean-Michel Courty and Serge Reynaud

Laboratoire Kastler Brossel, Université Pierre et Marie Curie, case 74, ENS, CNRS, 75252 Paris Cedex 05, France

(Received 17 January 1996, accepted 9 May 1996)

We evaluate the squeezing of a probe beam with a transverse Gaussian structure interacting with an ensemble of two-level atoms in a cavity. We use the linear input-output formalism where the effect of atoms is described by susceptibility and noise functions, and show that the transverse structure is accounted for by averaging these atomic functions over the intensity profile. The results of the plane-wave and Gaussian-wave theories are compared. We find that, when a large squeezing is predicted, the prediction of the plane-wave model is not reliable outside the Kerr domain. We give an estimate of the squeezing degradation due to the Gaussian transverse structure.

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