Self-gated two-photon photorefractive effect induced by light upconversion in Er-Doped LiTaO3.
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.
Kostritskii
S M
SM
Department of Physics, Kemerovo State University, 650043 Kemerovo, Russia.
Maring
D B
DB
Tavlykaev
R F
RF
Ramaswamy
R V
RV