Abstract:
The time dependence of the photorefractive light scattering in lithium niobate single crystals of the congruent composition (LiNbO$_3$) doped by “photorefractive” Cu cations (0.015 wt%) is studied for a radiation power of 160 mW. The data for the photorefractive scattering are confirmed by changes in Raman scattering spectra.