Fe∶LiN_bO_3全息图热定影及H^+浓度的影响  

Study on Thermal Fixing and the Influence of H^+ Concentration in Fe∶LiNbO_3 Hologram

作　　者：谢敬辉[1] 张泽明[1] 周元林[1] 孙萍[1] 何庆生[2] 邬敏贤[2] 金国藩[2] 

机构地区：[1]北京理工大学光电工程系,北京100081 [2]清华大学精密仪器系精密测控技术与仪器国家重点实验室,北京100084

出　　处：《光子学报》2003年第3期344-347,共4页Acta Photonica Sinica

基　　金：九七三国家重点基础研究基金资助项目 (CG19990 330 )

摘　　要：应用光折变效应动力学方程 ,导出了在Fe∶LiNbO3 中对光折变全息图热定影所需的最小H+浓度 ,以及H+浓度与光栅空间频率的关系 .应用光谱比较法测量了不同样品的H+浓度值 .得出了进行有效热定影的H+浓度范围 .完成了Fe∶LiNbO3 全息存储和热定影实验 .获得了 10 0h连续无损读出的良好热定影实验结果 .By application of kinetic equations for photorefractive effect, the minimal H+ concentration for thermal fixing the photorefractive holograms in Fe∶LiNbO 3 and the relationship between H+ concentration and spatial frequency of holograms are derived. The H+ concentration of several samples are measured with spectrum comparison method. The range of H+ concentration for effective thermal fixing is obtained. Experiments of holographic storage and thermal fixing in Fe∶LiNbO 3 are finished and good experimental results of 100 h continuous nonvolatile read out are showed.

关 键 词：掺铁铌酸锂晶体 全息存储 热定影 

分 类 号：O437[机械工程—光学工程]