Abstract

A new mechanism for enhancing the photorefractive grating amplitude in Bi12SiO20 is presented. We show experimentally that, by recording two photorefractive running gratings induced by two pairs of mutually incoherent laser beams, it is possible for the two gratings to transfer energy from one to the other. As might be expected, maximum energy transfer is obtained when the phase velocities of the two gratings are equal.

© 1995 Optical Society of America

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