Mechanisms of dynamic conversion of coherent optical beams in $CdS$

Theoretical and experimental investigations-were made of the process of energy transfer between two coherent beams during recording of a holographic grating in a cadmium sulfide crystal oriented in different directions with respect to the lines of the grating. It was shown that two mechanisms are responsible for the energy transfer: an electrooptic and a free-carrier mechanism. The type of carriers in the samples under study was determined from the direction of energy exchange.