近化学计量比高掺铁铌酸锂晶体的红光全息存储性能  

RED HOLOGRAPHIC STORAGE PROPERTIES IN HIGHLY Fe-DOPED NEAR STOICHIOMETRIC LiNbO_3 CRYSTALS

作　　者：范叶霞[1] 夏士兴[2] 徐超[2] 徐玉恒[2] 关承祥[3] 曹良才[4] 

机构地区：[1]哈尔滨理工大学材料科学与工程学院,哈尔滨150040 [2]哈尔滨工业大学化工学院,哈尔滨150001 [3]哈尔滨师范大学物理系,哈尔滨150080 [4]清华大学 精密测试技术及仪器国家重点实验室,北京100084

出　　处：《硅酸盐学报》2010年第5期820-824,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(60777006);清华大学精密测试技术及仪器国家重点实验室开放基金资助项目

摘　　要：采用提拉法生长了掺质量分数分别为0.01%,0.05%和0.10%Fe2O3的近化学计量比掺铁铌酸锂晶体(near stochiometric Fe:LiNbO3,Fe:NSLN)。采用633nm波长的激光作为光源,利用二波耦合实验和光斑畸变法研究了晶体的红光全息性能。结果显示:当铁含量小于0.05%时,随着铁含量的增加,晶体的写入时间和擦除时间变短,灵敏度增加,动态范围增大,最大衍射效率增强,抗光损伤能力降低。但当铁含量为0.10%时,最大衍射效率减小,抗光损伤能力急剧降低。结合晶体的结构缺陷模型对此现象进行了解释。A series of near stoichiometric Fe：LiNbO3 （Fe：NSLN） crystals doped with 0.01% （in mass, the same below）, 0.05% and 0.10%Fe2O3 were grown by Czochralski method. The red holographic properties of Fe：NSLN crystals were measured by the two-beam coupling experiment and transmitted beam pattern distortion method using 633 nm laser as light source. The results show that when the Fe-doped amount is less than 0.05%, as Fe-doped amount increases, both response time and erasure time of Fe：NSLN crystals are short, their sensitivity increases, the dynamic range and maximum diffraction efficiency enhance, and the photo-damage resistance ability reduces. However, when the Fe-doped amount reaches 0.10%, the maximum diffraction efficiency and photo-damage resistance ability of Fe：NSLN crystal decrease. Some related experimental results are explained based on Li-vacancy defect model.

关 键 词：掺铁铌酸锂晶体 全息存储性能 抗光损伤能力 提拉法生长 

分 类 号：O734[理学—晶体学]