title: Self-gated two-photon photorefractive effect induced by light upconversion in Er-Doped LiTaO3.
abstract: It is demonstrated that Er doping increases the photorefractive effect in LiTaO(3). Raman and fluorescence spectra are used to establish that the upconverted green emission of Er(3+) clusters acts as a gating source, significantly increasing the two-photon photorefractive effect of a monochromatic red or near-infrared pump source.
authors: Department of Physics, Kemerovo State University, 650043 Kemerovo, Russia.
authors: S M
authors: SM
authors: Kostritskii
authors: D B
authors: DB
authors: Maring
authors: R F
authors: RF
authors: Tavlykaev
authors: R V
authors: RV
authors: Ramaswamy