Influence of short-wavelength radiation of the visible range on the optical transmission of photorefractive lithium niobate samples

Abstract

Special features of the optical transmission of lithium niobate crystal samples with surface doping by photorefractive impurities at the wavelength of a helium-neon laser under short-wavelength incoherent background illumination are experimentally investigated and discussed. The possibility of optically controlled thermooptical modulation of the coherent light intensity with characteristic time of a few seconds is demonstrated for samples with surface doping by a combination of iron and copper ions. © 2006 Springer Science+Business Media, Inc.