title: Noise suppression in photorefractive image amplifiers.
abstract: We propose and experimentally demonstrate a simple technique capable of significantly enhancing the signal-to-noise ratio of photorefractive amplifiers. The optical noise due to amplified scattered light and multiple interface reflections is removed by performing two-wave mixing in off-axis-rotating BaTiO(3) and Bi(12)SiO(20) crystals. A 20-fold improvement of the signal-to-noise ratio is achieved, and virtually noise-free image amplifiers are demonstrated.
authors.forename: H
authors.initials: H
authors.lastname: Rajbenbach
authors.forename: A
authors.initials: A
authors.lastname: Delboulbé
authors.forename: J P
authors.initials: JP
authors.lastname: Huignard