Mg∶Er∶LiNbO_3晶体的生长和抗光损伤性能  

GROWTH AND PHOTODAMAGE RESISTANCE PERFORMANCES OF Mg∶Er∶LiNbO_(3) CRYSTALS

作　　者：刘波[1] 毕建聪[1] 徐玉恒[1] 

机构地区：[1]哈尔滨理工大学化学与环境工程学院,哈尔滨150040

出　　处：《硅酸盐学报》2005年第3期354-357,共4页Journal of The Chinese Ceramic Society

基　　金：国家基础研究973计划(G19990330);国家高科技发展863计划(2001AA31304)资助项目

摘　　要：在1%(摩尔分数,下同)Er∶LiNbO3中分别掺入2%,4%,6%的MgO,用提拉法生长Mg∶Er∶LiNbO3晶体。用X射线荧光光谱仪 测试Mg∶Er∶LiNbO3晶体中Mg和Er的分凝系数。采用m线法研究Mg∶Er∶LiNbO3晶体波导基片光损伤阈值。结果表明:随着Mg2+浓 度的增加,Er3+在LiNbO3中的分凝系数下降。6%Mg∶l%Er∶LiNbO3晶体波导基片光损伤阈值比l%Er∶LiNbO3基片提高2个数量级以 上。采用锂空位模型讨论Mg∶Er∶LiNbO3晶体光损伤阈值提高的机理。Doped with 2%, 4%, 6% of MgO(in mole, the same below) respectively in l%Er:LiNbO3, Mg: Er:LiNbO3 crystals were grown by Czochralski method. The segregation coefficients of Mg2+ and Er3+ in Mg:Er:LiNbO3 crystal were measured by X-ray fluorescent spectrograph. The photodamage threshold of Mg:Er:LiNbO3 waveguide substrate was tested by m-line method. The results show that with the increasing of the content of Mg2+ the segregation coefficient of Er3+ decreases in LiNbO3 crystal, while the photodamage threshold of Mg:Er:LiNbO3 waveguide substrate increases. The photodamage threshold of 6%Mg: 1 % Er:LiNbO3 was improved by two orders of magnitude than that of Er:LiNbO3. The increasing mechanism of the photodamage threshold is discussed by the Li-vacancy model.

关 键 词：双掺镁铒铌酸锂晶体 光损伤 分凝系数 晶体生长 提拉法 

分 类 号：O734[理学—晶体学]