A LiBaPO4 nonlinear optical crystal, a preparation method and use thereof

Abstract

The present application relates to a kind of LiBaPO4 nonlinear optical crystal and its preparation method and use.The chemical formula of the crystal is LiBaPO4, molecular weight is 239.24, belongs to monoclinic system Cc Space group, its powder X-ray diffraction result is consistent with the reported Cc Space group LiBaPO4 structure characteristic diffraction peak basically identical.The preparation method includes: with BaCO3, NH4H2PO4 And Li2CO3 As raw material, it is mixed uniformly according to 1:1:0.5 Mole ratio is pre-fired, then tabletting and high temperature sintering, again after annealing and slow cooling treatment, obtain target LiBaPO4 Material.This material has shorter ultraviolet absorption cut-off edge and stronger secondary nonlinear response, diffuse reflection test shows that its absorption cut-off edge is about 196 nm, powder frequency doubling test shows that its secondary harmonic response average intensity is about 3 times of KDP.This material can be used as ultraviolet nonlinear optical frequency conversion material, and when meeting the transmission range and phase matching condition, it is expected to expand to deep ultraviolet waveband application.

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