声光可调谐滤波器中波导与模分离器的设计  

Design of Acousto-optic Tunable Filter's Optical Waveguide and Mode Splitter

作　　者：平均芬[1] 乐孜纯[2] 

机构地区：[1]浙江工业大学信息工程学院,浙江杭州310014 [2]浙江工业大学理学院,浙江杭州310032

出　　处：《光电技术应用》2008年第6期36-40,共5页Electro-Optic Technology Application

基　　金：浙江省科技计划重点项目(2005C21010)

摘　　要：声光可调谐滤波器(AOTF)是一种基于集成光学技术的光学器件,它的性能主要取决于它的各个关键模块,特别是光波导和模分离器的设计.首先采用有效折射率法设计了工作于1.55μm处的Ti:LiNbO3单模波导,之后对所设计波导的模场进行了模拟,并对模拟结果进行了分析.在单模光波导设计的基础上,采用光束传播方法(BPM)设计了TE/TM模分离器,并分析了它的消光比.最终得出波导和模分离器的优化设计结果.Acousto-optical tunable filter （AOTF） is an optical element based on integral optical technology, the performances of AOTF is mainly decided by its key parts including Ti ： LiNbO3 waveguide working at 1.55um and the TE/TM mode splitter. Firstly the Ti ： LiNbO3 waveguide working at 1.55um is designed based on the method of effective refraction, and then the mode distribution of this waveguide is simulated and analyzed. Basing on the Ti： LiNbO3 waveguide design, then the TE/TM mode splitter is designed and given out its performance analysis. Finally the optimal design parameters are given.

关 键 词：Ti:LiNbO3波导 TE/TM模分离器 光束传播法(BPM) 

分 类 号：TN25[电子电信—物理电子学]