title: Effect of the oxidation state of LiNbO(3):Fe on the diffraction efficiency of multiple holograms.
abstract: We show that the oxidation state of Fe in LiNbO(3) has two competing effects on the diffraction efficiency of multiple holograms in 90 degrees -geometry holographic storage. For crystals with moderate absorption, the saturation space-charge field is larger after high-temperature reduction treatment. However, reduction also increases absorption, which reduces the overall diffraction efficiency. We develop a theoretical model that predicts achievable diffraction efficiency as a function of oxidation state, doping level, photovoltaic field, crystal length, and region of beam overlap. We compare this model with experimental results for achievable diffraction efficiency and erasure-time constant.
authors.forename: G W
authors.initials: GW
authors.lastname: Burr
authors.forename: D
authors.initials: D
authors.lastname: Psaltis