Abstract
The effects of overall rectification and second-harmonic generation of space-charge waves in photorefractive crystals were reliably detected. The effect of overall rectification results in variations of the dc current flowing in a circuit containing a photorefractive crystal and a voltage source when space-charge waves are excited in the crystal. In the experiments, variations in the dc current reached 20%. Two mechanisms responsible for second-harmonic generation were experimentally revealed. The theory of the observed effects is briefly described.
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