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Nonlinear Optics

Effects of dephasing on the nonlinear phase shift obtained from a one-dimensional atom

Hisaki Oka, Holger Friedrich Hofmann, Shigeki Takeuchi, Keiji Sasaki

Published Jan 1, 2004• 0 citations
Publisher

Abstract

We investigate the effects of dephasing on the nonlinear phase shift obtained from a one-dimensional atom. A maximal 180° phase shift is obtained for atomic dephasing rate smaller than the coherent atom-field coupling rate.
DOI
10.1364/nlo.2004.wd12

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The cross-Kerr effect is studied for two pulses propagating in an atomic medium in a tripod configuration, dressed by a strong standing wave coupling beam. Nonlinear phase shifts for both transmitted and reflected beams are calculated taking into account the redistribution of the population among the atomic levels which allows one to study the phase shifts in a wide range of pulse detunings. The influence of other parameters, e.g., the intensity of the control field and the relaxation rates, on the cross-Kerr effect is also examined in detail.