We determine, by a photoinduced light scattering study, that the increase of photorefractive sensitivity of the proton exchange waveguides in lithium niobate crystals is more than 3 orders of magnitude as a result of copper doping under certain conditions. This increase is determined to be due to the nonphotovoltaic contribution to photorefraction with a short responsiveness time.
© 1994 Optical Society of America
S. M. Kostritskii and O. M. Kolesnikov, "Photoinduced light scattering in copper-doped Li1-xHxNbO3 photorefractive waveguides," J. Opt. Soc. Am. B 11, 1674-1680 (1994)