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Optica Publishing Group
  • International Conference on Quantum Electronics
  • OSA Technical Digest (Optica Publishing Group, 1988),
  • paper MP49

INHOMOGENEOUS DEPHASING IN HIBITION IN A STRONG STOCHASTIC FIELD

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Abstract

A few years ago, an experiment by De Voe and Brewer [1] renewed Interest for the description of optical excitation in the saturation regime, when a stochastic perturbation is present. In that experiment, the decrease of a Free Induction Decay signal was observed to be slower than expected, when the sample was resonantly excited by a strong field. The ability of Optical Bloch Equation to describe relaxation processes under strong field conditions was reexamined [2]. The De Voe and Brewer experiment was performed in an impurity-ion solid Pr3+:LaF3. The stochastic perturbation under investigation was a fluctuation in the resonance frequency of the Pr3+ ions, which was caused by the flip-flop motion of the F nuclear spins. Later on, an analog feature was observed In an atomic vapor [3]. Then fluctuation in the atom resonance frequency was produced by collisional velocity changes which modified the frequency Doppler-shift. More generally, these features express the inhibition of inhomogeneous broadening by a strong field [4]. In all these works, the sample is irradiated by a monochromatic field.

© 1988 Optical Society of America

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