掺铁钽酸锂晶体的生长及其光学性能的研究  

Growth and Optical Properties of Fe： LiTaO3 Crystals

作　　者：石连升[1] 高岩[1] 

机构地区：[1]哈尔滨理工大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《哈尔滨理工大学学报》2009年第A01期121-123,共3页Journal of Harbin University of Science and Technology

摘　　要：在LiTaO3（LT）中掺进不同摩尔分数的Fe2O3，用提拉法生长Fe：LiTaO3晶体，测试了晶体的晶格常数、吸收光谱和红外光谱．发现晶体的晶格常数随着Fe2O3掺入量的增加而变大．晶体的吸收边随着铁含量的增加而发生红移，并在520nm处有一吸收峰，是对Fe^2＋离子的吸收．LiTaO3晶体的OH^-吸收峰位置在3477cm^-1，当掺杂Fe2O3后，吸收峰的位置仍然在3477cm^-1附近，红外光谱的吸收基本上没有变化．利用二波耦合光路测试了晶体的指数增益系数，计算了有效载流子浓度．测试结果表明,随着掺铁量的增大,其指数增益系数和有效载流子浓度都增大．By doping different concentrations of Fe2O3 in raw materials of LiTaO3 ctystal. Fe-doped congruent LiTaO3 were grown by Czochralski method. The lattice constants, absorption spectra and infrared spectra were measured. The results show that lattice constants is increased with the increase in Fe2O3 content. Absorption edge of Fe： LiTaO3 shifts to the longer wavelength with the increase in iron content and there is a absorption in 520-nm that is produced by Fe^2＋. The obsorption peak of LiTaO3 crystals is in the 3 477 cm^-1. when doped in Fe2O3 ,the obsorpfion peak are still in the vicinity of 3 477 cm^-1 , infrared spectrum is not change. The exponential gain coefficient of Fe ： LiTaO3 crystals are measured by two-wave coupling light and the effective carriers densities were computed. The result indicates that exponential gain coefficient and the effective carriers densities are increased.

关 键 词：掺铁钽酸锂晶体 光学性能 提拉法晶体生长 吸收光谱 

分 类 号：O782[理学—晶体学]