光学学报, 2000, 20 (11): 1499, 网络出版: 2006-08-09
Z切LiNbO3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 LiNbO3
摘要
系统地研究Z切LiNbO3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。
Abstract
The result of a systematic study on planar waveguides fabricated in z-cut LiNbO3 by proton exchange and the post-annea ling is reported. The diffusion constant and the activation energy can be deduc ed from the proton exchange process. It was found that index profile of the as -exc hanged wavegudies is a linear step profile. The index profile changes from step -like to Gaussian profile with succesive annealing. The annealing depth increase s 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.
曹霞, 夏宇兴, 杨艺, 汪平河, 范建国. Z切LiNbO3晶体中退火质子交换光波导特性的研究[J]. 光学学报, 2000, 20(11): 1499. 曹霞, 夏宇兴, 杨艺, 汪平河, 范建国. Characterization of Annealed Proton Exchanged Optical Waveguides in Z-Cut LiNbO3[J]. Acta Optica Sinica, 2000, 20(11): 1499.