title: Intensity dependence and white-light gating of two-color photorefractive gratings in LiNbO(3).
abstract: Photorefractive gratings have been written in Pr:LiNbO(3) by use of a diode laser for writing and of filtered white light (390-520nm) as a gating source. The gating light increases the writing efficiency by more than 3 orders of magnitude, and the two-step writing process provides nondestructive readout. The material sensitivity for two-color writing rises strongly for gating wavelengths near the bandgap and approaches that of Fe-doped lithium niobate at power densities of a few watts per square centimeter. In addition, we show that the dynamic range of the recording process is strongly dependent on the writing intensity.
authors.forename: H
authors.initials: H
authors.lastname: Guenther
authors.forename: G
authors.initials: G
authors.lastname: Wittmann
authors.forename: R M
authors.initials: RM
authors.lastname: Macfarlane
authors.forename: R R
authors.initials: RR
authors.lastname: Neurgaonkar