基于广角FD-BPM的PML边界处理方法  

PML BOUNDARY TREATMENT METHOD BASED ON WIDE-ANGLE FINITE-DIFFERENCE BEAM PROPAGATION METHOD

作　　者：林青春[1] 肖悦娱[1] 何赛灵[1] 

机构地区：[1]浙江大学现代光学仪器国家重点实验室浙江大学光及电磁波研究中心,杭州310027

出　　处：《光子学报》2002年第3期349-353,共5页Acta Photonica Sinica

基　　金：浙江省自然科学基金重点项目 ( ZD0 0 0 2 )

摘　　要：本文提出了基于三阶 Padé近似广角有限差分光束传输法 (FD- BPM)的简单有效的完美匹配层 (PML)边界处理方法 .分别给出了该方法应用于斜波导和多模干涉 (MMI)数值模拟的结果 ,并与用完全透明边界条件处理的模拟计算结果进行了比较 .本文最后对基于广角 FD- BPM的 PML边界处理方法进行了优化 .Finite-difference beam propagation method (FD-BPM) is widely used for quick and accurate modeling of beam propagation in waveguide components.An appropriate boundary treatment is crucial to improve the accuracy of this method,particularly for wide-angle propagation problems.In this paper,A simple and effective PML boundary treatment based on wide-angle finite-difference beam propagation method (with 3rd order Padé approximation) is presented.To show the effectiveness of this method,numerical results for oblique waveguide and multimode interference are presented and compared with the transparent boundary condition(TBC).The PML boundary treatment is also optimized.

关 键 词：完美匹配层 有限差光束传输光 广角传播 多模干涉 FD-BPM PML 边界处理 斜波导 数值模拟 

分 类 号：TN252[电子电信—物理电子学]