掺镁铌酸锂晶体的光学均匀性和抗光伤性研究  

Optical Homogeneity and Optical Damage Resistance of MgO-Doped LiNbO_3 Single Crystals

作　　者：唐连安[1] 朱泉宝[1] 王锦昌[1] 周燕飞[1] 谭浩然[1] 

机构地区：[1]中国科学院上海硅酸盐研究所

出　　处：《无机材料学报》1996年第3期415-418,共4页Journal of Inorganic Materials

摘　　要：研究了不同Ｌｉ／Ｎｂ克分子比、掺镁铌酸锂（ＭｇＯ：ＬｉＮｂＯ_３）晶体的光学均匀性和抗光伤特性．以二元同成分配比为基础，掺入约５ｍｏｌ％ＭｇＯ的ＬｉＮｂＯ_３晶体显示出高的抗光损伤特性，但光学均匀性较差．根据ＭｇＯ－Ｌｉ_２Ｏ－Ｎｂ_２Ｏ_５三元相关系研究寻找到的三元同成分配比，生长出的ＭｇＯ：ＬｉＮｂＯ_３晶体具有优良的光学均匀性，但其抗光伤能力低．发现当配料组成为Ｌｉ／Ｎｂ＝４７．８／５２．２，而ＭｇＯ的掺入量为５．７ｍｏｌ％时，晶体既具有良好的光学均匀性，也有较好的抗光伤性．In order to improve the optical homogeneity and optical damage resistance of MgO:LinbO_3, Crystals with different Li/Nb ratios and MgO doping levels were grown. It was found that when the melt composition was Li/Nb=48.6/51.4 (molar ratio) and MgO=5mol%, the Crystal possessed high optical damage resistance, but degraded optical homogeneity. On the contrary, Crystals of ternary congruent composition exhibited excellent optical homogeneity, but lower optical damage resistance.A compromise was made between the optical homogeneity and optical damage resistance,when the melt composition was Li/Nb=47.8/52.2 and MgO=5.7mol%.

关 键 词：掺镁 铌酸锂 单晶 光学均匀性 铁电材料 

分 类 号：TM221.014[一般工业技术—材料科学与工程]