首页 | 本学科首页   官方微博 | 高级检索  
     

LiNbO3:Fe晶体中光写入平面光波导的导光特性研究
引用本文:张鹏,赵建林,杨德兴,王美蓉,孙一栋. LiNbO3:Fe晶体中光写入平面光波导的导光特性研究[J]. 物理学报, 2004, 53(10): 3369-3374
作者姓名:张鹏  赵建林  杨德兴  王美蓉  孙一栋
作者单位:西北工业大学应用物理系,西安 710072
基金项目:国家自然科学基金(批准号:60077018)资助的课题.
摘    要:从光折变效应的单中心模型和载流子的光伏迁移机理出发给出了高斯片光在LiNbO3:Fe晶 体中导致的折射率变化分布的解析表达式.利用片光以“三明治”辐照方式在LiNbO3:Fe晶 体中写入了平面光波导结构.用切片干涉法测量了波导区的折射率分布,并对波导进行了简 单的导光测试.根据射线方程以及波导的折射率分布对光写入波导的导光特性进行了模拟计 算分析.研究结果表明,在LiNbO3:Fe晶体中光写入光波导是可行的. 关键词:LiNbO3:Fe晶体光辐照法平面光波导导光特性高斯片光

关 键 词:LiNbO3:Fe晶体  光辐照法  平面光波导  导光特性  高斯片光
收稿时间:2003-11-23
修稿时间:2004-02-09

Analyses of guiding properties of light-induced planar waveguides in LiNbO3:Fe crystals
Zhang Peng,Zhao Jian-Lin,Yang De-Xing,Wang Mei-Rong and Sun Yi-Dong. Analyses of guiding properties of light-induced planar waveguides in LiNbO3:Fe crystals[J]. Acta Physica Sinica, 2004, 53(10): 3369-3374
Authors:Zhang Peng  Zhao Jian-Lin  Yang De-Xing  Wang Mei-Rong  Sun Yi-Dong
Abstract:To our knowledge, we first deduced the analytic expression of the index changed istribution in LiNbO3:Fe crystal induced by a Gaussian sheet beam considering th e photorefractive one center model and the photovoltaic charge carriers transp or tmechanism. A planar waveguide structure was fabricated by sheet beam illuminat ion employing the sandwich method in LiNbO3:Fe crystal. The index distribu tion i n the waveguide region was measured by using interferometric technique and the g uiding test was also performed. The rationality of the deduced analytic expression was demonstrated by the fitting results of the measured data point. Based on the ray equation, the guiding properties of the light-induced waveguide were analyzed by using numerical simulation. The results show that the interferom etric technique is valid for measuring the index distribution of waveguide with large width, and the guiding properties of the light induced waveguide structures depend on the waveguide width strongly. Using sheet beam with small width, planar waveguide structure with high quality can be fabricated in LiNbO3:Fe cryst al . And the analytic expression of the index change distribution can be employed to predict the guiding properties of the light induced waveguide.
Keywords:LiNbO3:Fe  light irradiation  planar waveguide  guiding properties  Gaussian sheet beam
本文献已被 维普 万方数据 等数据库收录!
点击此处可从《物理学报》浏览原始摘要信息
点击此处可从《物理学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号