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Soviet Journal of Quantum Electronics

Dynamic Stark effect and parametric bleaching of a medium

Vv Krasnikov, Maxim S. Pshenichnikov, Vladimir S Solomatin

Published Aug 31, 1988• 2 citations
Publisher

Abstract

An investigation was made of the influence of the Stark level shift on parametric bleaching of a medium. The oscillatory character of the establishment of parametric bleaching was recorded. It was found that the period, amplitude, and rate of damping of the oscillations were governed by the intensities of the pump waves and depended on the complex matrix elements of the transitions. Thus, a change in the character of the establishment of parametric bleaching from oscillatory to aperiodic was observed as the pump intensities decreased. The experimental dependences agreed with the theoretical calculations within the measurement error.

DOI
10.1070/qe1988v018n08abeh012391

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An investigation was made of the influence of the Stark level shift on parametric bleaching of a medium. The oscillatory character of the establishment of parametric bleaching was recorded. It was found that the period, amplitude, and rate of damping of the oscillations were governed by the intensities of the pump waves and depended on the complex matrix elements of the transitions. Thus, a change in the character of the establishment of parametric bleaching from oscillatory to aperiodic was observed as the pump intensities decreased. The experimental dependences agreed with the theoretical calculations within the measurement error.
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The effect of externally produced Stark splitting upon fine-structure-level probabilities is investigated in order to describe periodic intensity variations previously found in hydrogen lines. Coupled differential equations for the probability amplitudes of mixed levels are solved exactly in terms of initial amplitudes; effects due to spontaneous transition probabilities and Lamb shift are included. In general, the time-dependent line intensity is a combination of exponential decays and sinusoidal oscillations. The frequencies of oscillations are discussed in detail, and the effects of different initial conditions upon the intensities are considered for several special cases.