Photovoltaic current in high-temperature photorefractive DKDP crystal is measured directly using the original technique based on the current-to-voltage converter operating in the pulse regime. Theoretical consideration of the mechanisms involved and estimates of the observed values are presented. On the basis of the dislocation model we succeeded to get quantitative agreement with the existing experimental data in the value of photoinduced electrical field as well as in the dynamics ofboth the PR response and the photovoltaic current

ABSRACTThe accounted by us in dislocational model a room-temperature photorefractive effect [1] due to failure of dislocations to new fastening points [2]. It gives to initiation of electrical polarized areas in light heating zones in KDP crystal. In this investigation pulse currents generated in the crystal at its pulsing irradiation have been detected.