不同衬底折射率的多模干涉耦合器(英文)  

Multimode Interference Couplers with Different Background Refractive Index

作　　者：王小龙[1] 余金中[1] 

机构地区：[1]中科院半导体所光电子研究发展中心,北京100083

出　　处：《光子学报》2003年第9期1045-1048,共4页Acta Photonica Sinica

基　　金："973"projectfromNationalScienceandTechnologyMinistryundercontractNo.G2 0 0 0 0 36 6;KeyprojectfromNationalNaturalScienceCommitteeundercontractNo.6 9990 5 4 0

摘　　要：设计了一种具有不同衬底折射率的新型多模干涉耦合器 ,在多模波导区引入了更强的光场限制 ,激发更高阶的导模 ,从而提高映像质量 采用二维有限差分波束传播方法模拟了这种新型的结构 ,结果表明 :与传统结构相比 ,以功率均衡性和附加损耗为衡量标准的映像质量有了明显提高A novel structure of MMI coupler with different background refractive index has been designed. With stronger optical confinement in multimode waveguides, more guided modes are excited to improve imaging quality.Two dimensional finite difference beam propagation method (2 D FDBPM) was used to simulate this new structure and had proven that its imaging quality, in terms of power uniformity and excess loss, is much better than conventional structure. This structure can be applied in SOI rib waveguides by deep etching method.

关 键 词：多模干涉耦合器 折射率 导模 映像质量 二维有限差分波束传播方法 三维SOI脊形波导 

分 类 号：TN622[电子电信—电路与系统] TN252