Indium cerium iron triple-doped lithium niobate crystal and preparation method thereof

Abstract

The invention provides an indium cerium iron triple-doped lithium niobate crystal and a preparation method thereof, belonging to the non-linear optical crystal field. The crystal is prepared by Li2CO3, Nb2O5, Fe2O3, CeO2 and In2O3 with purity of 99.99 percent; the preparation method comprises steps of: 1) weighing the powder according to certain proportion, fully mixing and then sintering the powder; 2) heating the powder by an intermediate frequency furnace, and adopting a pulling method to develop the indium cerium iron triple-doped lithium niobate crystal according to procedures of seeding, necking, shouldering, back shouldering, growing with a constant diameter, pulling and separating and annealing; 3) testing the crystal through two-wave coupling; and 4) testing the crystal through a direct transmission light spot distortion method. The invention comprehensively employs two means of light-resistant damage element doping and stoichiometric ratio growth, and obvious improves the photo damage resistance and the response time of the lithium niobate crystal on the basis of maintaining the original excellent performances of the lithium niobate crystal, and the invention will greatly promote the application of the lithium niobate crystal material in the three-dimensional body holographic storage field, and has broad market prospect.