Holographic storage in U-doped LiNbO_3

Abstract
A single LiNbO3 crystal doped with U ions is a new sensitive phase holographic material with high diffraction efficiency and with long thermal decay time of a hologram. The energy density of a 4880-Å beam from an Ar-ion laser required to reach 40% diffraction efficiency is about 1 J/cm2 for a 1.2-mm thick crystal. Diffraction efficiency of a hologram stored in an U-doped LiNbO3 crystal was scarcely reduced from its initial value when the crystal was held at room temperature for 150 days.

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