平板光波导高通滤波特性的模场分析  

Mode Field Analysis of High-pass Filtering Characteristics in Planar Optical Waveguides

作　　者：黄重庆 刘慎标 万婷 刘靖 HUANG Chongqing;LIU Shenbiao;WAN Ting;LIU Jing(School of Physics and Electronic Science,Hunan Institute of Science and Technology,Yueyang 414006,China;School of Information Science and Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China)

机构地区：[1]湖南理工学院物理与电子科学学院,湖南岳阳414006 [2]湖南理工学院信息科学与工程学院,湖南岳阳414006

出　　处：《湖南理工学院学报（自然科学版）》2024年第3期15-19,共5页Journal of Hunan Institute of Science and Technology(Natural Sciences)

基　　金：国家重点研发计划(2023YFB4006001);湖南理工学院研究生课程案例库建设项目(02152501)。

摘　　要：结合几何光学和波动光学两种方法分析了平板光波导中的导模分布和传输特性.采用二维时域有限差分法,用不同波长光波激励同一波导,精确计算了波导中的模场分布.结果表明,光场在波导中传输时,即使是基模,尽管满足全反射条件,光波能量也会不断外泄,从而导致能量逐渐减少,且波长愈长,能量泄漏愈快,体现了平板光波导的高通滤波特性.The distribution of guided modes and transmission characteristics in planar optical waveguides is analyzed using two methods:geometrical optics and wave optics.The mode field distribution within the same waveguide is accurately calculated by exciting it with light waves at different wavelengths,employing the two-dimensional time-domain finite difference method.The results indicate that light wave energy continuously leaks out and diminishes over time;additionally,longer wavelengths result in faster energy leakage,even when the total reflection condition is satisfied in the fundamental mode.This phenomenon reflects the high-pass filter characteristics of planar optical waveguides.

关 键 词：平板光波导 高通滤波 时域有限差分法 模场 

分 类 号：TN252[电子电信—物理电子学]