抗紫外光损伤铌酸锂晶体及其应用研究

项目名称： 抗紫外光损伤铌酸锂晶体及其应用研究

项目编号： No.61205176

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 刘宏德

作者单位： 南开大学

项目金额： 28万元

中文摘要： 铌酸锂晶体对于集成光学和非线性光子学是一种有用的材料，但是光折变（光损伤）阻碍了它在紫外光区的应用。掺锆铌酸锂晶体打破了这一禁锢，使得铌酸锂具有了很强的抗紫外光损伤能力。但其抗紫外光损伤的微观机制还不清楚，其紫外倍频应用也没有实现。 本项目将就一系列掺杂（锆、铪、锡）铌酸锂晶体，通过对其抗紫外光损伤性能和紫外光折变中心的研究，揭示铌酸锂抗紫外光损伤机制，弄清晶体掺杂、组分与抗紫外光损伤的关联性，建立铌酸锂紫外光折变中心与抗紫外光损伤性能间的构效关系；同时，提高晶体的抗光损伤性能，实现铌酸锂晶体的紫外倍频，并优化其相位匹配温度至室温，获得性能优异的在室温下使用的紫外倍频铌酸锂晶体。

中文关键词： 铌酸锂；抗光损伤；紫外；倍频；

英文摘要： Although lithium niobate is a useful material for integrated optics and nonlinear photonic science, but photorefractive effects (optical damage) hindered its application in the UV region. Zirconium-doped lithium niobate crystal achieves a breakthrough in lithium niobate with high optical damage resistance ability in the ultraviolet band. However, the microscopic mechanism of its anti-UV damage is unclear; UV SHG (second harmonic generation) application is not implemented. This project will grow a series of doping (Zr, Hf, Sn) lithium niobate crystal, study its performance of UV optical damge resistance and UV photorefractive center, revealing its anti-UV damage mechanisms, clarifing the correlation between crystal doping, composition and its anti-UV damage performance, to establish the structure-performance relationship between UV photorefractive centers and perfomance of the resistance to UV optical damage; the same time, achieve the UV SHG on lithium niobate crystals, and optimize their the phase matching temperature to room temperature, to get the excellent lithium niobate crystals with UV second harmonic generation used at room temperature.

英文关键词： lithium niobate；anti optical damage；ultraviolet；frequency doubling；