摘要
利用有限差分方法(FDM)对大横截面SOI(Silicon on insulator)脊型光波导的本征模进行了计算分析,从而确定了SOI脊型波导的单模条件,即归一化外脊高和归一化脊宽的关系 通过比较,进一步明确了归一化外脊高大于0. 5时现有的单模条件解析公式中常数项的取值为0. 3 同时,还对归一化外脊高小于0. 5时的单模条件也做了计算和讨论。
The single mode condition for a rib waveguide based on silicon-on-insulator (SOI) is determined through the eigen mode analysis using a finite difference method. This single mode condition gives the relation between the normalized rib height r and the normalized rib width t. A comparison is made between the present result obtained with a FDM and previous analytical formulas for the single mode condition. Simulation results show that the value for the constant in the previous analytical formulas should be chosen as 0.3 when r > 0.5. The present single mode condition is also extended to the range of r less than or equal 0.5 (which is not considered before).
出处
《光子学报》
EI
CAS
CSCD
北大核心
2005年第5期669-671,共3页
Acta Photonica Sinica
基金
浙江省科技计划项目No.2004C131095
国家自然科学基金(60377022)
关键词
单模条件
有限差分方法
脊型波导
Single mode condition
Finite-Difference-Method (FDM)
Rib waveguide
