Abstract

The fundamental component of the space-charge field in a photorefractive crystal is studied in the presence of an applied alternating electric field. A general equation for the amplitude of the fundamental space-charge field is derived, and a solution in integral form is given for the linear-modulation approximation. Exact and approximate analytical solutions are presented for the case in which the applied field varies in time as a square and a sine wave, respectively. The temporal variation of the amplitude of the space-charge field is investigated for both waveforms of the applied field, and the oscillation amplitude dependence on repetition frequency and interbeam angle is studied.

© 1994 Optical Society of America

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