TE_(01)-TE_(11)模式变换器的迭代设计方法  

Iteration design method for TE_(01)-TE_(11) mode converter

作　　者：王强[1,2] 周海京[3] 杨春[2] 李彪[2] 赫英毅[2] 

机构地区：[1]清华大学工程物理系,北京100084 [2]中国工程物理研究院电子工程研究所,四川绵阳621900 [3]北京应用物理与计算数学研究所,北京100094

出　　处：《强激光与粒子束》2011年第11期3154-3156,共3页High Power Laser and Particle Beams

摘　　要：对模式变换器的迭代设计方法做了改进:给出了合理的迭代步长初始值取值方式;在迭代时只考虑了贡献较大的几条耦合线,而忽略了贡献小的耦合线,从而改善带宽。利用改进的迭代设计方法设计了波导直径与自由空间波长比值为2.765 5的TE01-TE11模式变换器,总长度为600mm,相对带宽为6%,中心频率转换效率为99.14%,总计算时间为40s。利用CST软件进行了仿真验证,结果吻合较好。Two improvements in the iteration method for mode converter design are presented,i.e.a reasonable initial step value in every iteration is given and coupled lines of less contribution are ignored to improve bandwidth.A TE01-TE11 mode converter is designed with the improved iteration method,whose ratio of waveguide radius to free space wavelength is 2.765 5.Simulation results show that its relative bandwidth reaches 6%,total length is 600 mm,and conversion efficiency is 99.14% at the central frequency.The total calculation time is 40 s.The CST simulation result agrees well with the coupled mode simulation one.

关 键 词：模式变换器 相位重匹配法 迭代法 耦合模理论 过模波导 

分 类 号：TN811[电子电信—信息与通信工程]