Z切LiNbO_(3)晶体中退火质子交换光波导特性的研究  

Characterization of Annealed Proton Exchanged Optical Waveguides in Z Cut LiNbO_(3)

作　　者：曹霞[1] 夏宇兴[1] 杨艺 汪平河 范建国[1] 

机构地区：[1]上海交通大学应用物理系,上海200030

出　　处：《光学学报》2000年第11期1499-1503,共5页Acta Optica Sinica

摘　　要：系统地研究 Z切 L i Nb O3晶体中质子交换波导和退火质子交换波导的特性 ,得到了质子交换过程中的扩散常数和激活能 ,发现了质子交换波导的折射率呈线性阶跃型的折射率分布。通过连续退火 ,波导的折射率分布由线性阶跃型向高斯型过渡。退火可分为两个阶段 ,波导深度的增加在第一阶段随退火时间成指数关系 ,第二阶段与退火时间的平方根成线性关系。The result of a systematic study on planar waveguides fabricated in z cut  LiNbO 3 by proton exchange and the post annealing is reported The diffusion constant and the activation energy can be deduced from the proton exchange process It was found that index profile of the as exchanged wavegudies is a linear step profile The index profile changes from step like to Gaussian profile with succesive annealing The annealing depth increases exponentially with annealing time at the first stage and then increases linearly with the square root of annealing time at the second stage of annealing

关 键 词：LiNbO_(3)质子交换光波导 退火 折射率分布 

分 类 号：TN252[电子电信—物理电子学]