弯曲波导中基于PML边界条件的柱坐标广角BPM  

Cylindrical Coordinate Wide-angle BPM with PML Boundary Condition in a Bent Waveguide

作　　者：戴道锌[1] 敖献煜[1] 周勤存[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光及电磁波研究中心,浙江杭州310027

出　　处：《光电子．激光》2003年第4期331-335,共5页Journal of Optoelectronics·Laser

基　　金：浙江省科技计划重大项目(001101027)

摘　　要：给出了基于完美匹配层边界条件(PML-BC)的柱坐标广角波束传播方法(BPM)。用(2,2)阶Padé近似的广角BPM对光在弯曲波导中的传输特性进行了计算和分析,获得了比近轴BPM更精确的结果。采用了PML-BC,减小了边界反射,获得了比透明边界条件(TBC)更好的结果。wide-angle beam propagation method (BPM) with a perfect matched layer boundary condition (PML-BC) in a cylindrical coordinate system was presented. Characteristics of light propagating in a bent waveguide were analyzed by using the wide angle BPM based on (2,2) Pade approximation. Precise numerical results were obtained. The reflection at the boundary is reduced greatly by using the PML-BC. And the result obtained by using PML-BC is better than that obtained by using transparent boundary condition (TBC).

关 键 词：弯曲波导 PML 广角 束传播方法 BPM 完美匹配层 边界条件 透明边界条件 

分 类 号：TN814[电子电信—信息与通信工程]