title: Observation and thermal fixing of holographic gratings in lead barium niobate crystal.
abstract: We report what we believe to be the first observation of photorefractive gratings in lead barium niobate (Pb(1-x)Ba (x)Nb(2)O>( 6) ; PBN). A diffraction efficiency of 9% and a beam-coupling coefficient of 9 cm(-1) are obtained. After thermal fixing a grating of 0.5% is revealed at room temperature. We can improve this diffraction efficiency by optimizing fixing temperature, timing, and material parameters.
authors.forename: A Y
authors.initials: AY
authors.lastname: Liu
authors.forename: M C
authors.initials: MC
authors.lastname: Bashaw
authors.forename: M
authors.initials: M
authors.lastname: Lee
authors.forename: R S
authors.initials: RS
authors.lastname: Feigelson