一种分析三维楔脊形光波导与光纤耦合的方法  

A method for analyzing the coupling of 3-D tapered rib waveguides with Fibers

作　　者：刘敬伟[1] 陈少武[1] 余金中[1] 

机构地区：[1]中国科学院半导体研究所光电研究发展中心,北京100083

出　　处：《物理学报》2005年第1期6-11,共6页Acta Physica Sinica

基　　金：国家高技术研究发展计划 (批准号:2 0 0 2AA3 12 0 60 );国家重点基础研究发展计划(批准号 :G2 0 0 0 0 3 66)资助的课题~~

摘　　要：和直波导的不同在于 ,三维楔脊形波导中的光场都是不稳定的 .分别对波导_光纤耦合、光纤_波导耦合两种情况 ,将三维楔脊形波导等效为多段短的直波导 ,利用束传播法同时对三维楔脊形波导内不稳定的入射、反射场 ,及它们在传播方向上的偏导进行处理 ,再用自由空间辐射模法计算透射率和反射率 .以SOI楔脊形波导和光纤的耦合为例 。The fields in 3-dimensional tapered waveguides are unstable compared with the fields in the straight waveguides. In the case of waveguide-to-fiber coupling and fiber-to-waveguide coupling, a sequence of short straight waveguides has been modeled to approximate the 3-dimensional tapered waveguide; and the unstable incident and reflected fields, as well as their derivatives, were determined by the beam propagation method(BPM). Then free space radiation mode(FSRM) was employed to calculate the reflected and transmitted powers. Analysis results of the coupling of fiber with silicon-on-insulator(SOI) tapered rib waveguides showed the feasibility of the method.

关 键 词：脊形波导 光纤耦合 脊形光波导 直波导 辐射模 SOI 自由空间 光场 反射场 三维 

分 类 号：TN25[电子电信—物理电子学]