聚合物Y分支波导的TM模分析  

TM mode analysis of polymeric Y-junction waveguide

作　　者：陆荣国[1] 刘永智[1] 廖进昆[1] 张长命[1] 廖翊韬[1] 

机构地区：[1]电子科技大学,成都610054

出　　处：《激光杂志》2007年第1期14-15,共2页Laser Journal

摘　　要：本文利用有效折射率法计算聚合物脊形波导的横向折射率分布,将三维光波场传播问题简化为二维问题;从导模满足的标量波动方程出发,结合透明边界条件,采用Crank-Nicholson差分格式,得出有限差分束传播法的基本方程。对Y分支波导结构中TM模的传播及损耗特性进行理论分析,得出了优化的结构参数:Y分支角α=1.1°,脊宽W=5μm,波导间距G=20μm。By using Effective Index Method （EIM） to calculate the transverse refractive index distribution of polymeric ridge waveguide, we successfully simplified the 3 dimensional problem into a 2 dimensional one, By starting from the scalar wave equation that satisfy the guided modes, employing Transparent Boundary Condition （TBC） and the Crank - Nicholson difference scheme, the basic equations of the finite difference beam propagation method are obtained. The theoretical analysis of the TM mode lightwave propagation and loss characteristics of the Y - junction waveguide structure gives rise to the optimized structure parameters： Y - junction angles α = 1. 1° rib width W = 5μm, separation gap G = 20μm.

关 键 词：电光聚合物 Y分支波导 TM模 有效折射率法 有限差分束传播法 

分 类 号：TN248.1[电子电信—物理电子学]