平顶型蚀刻衍射光栅波分复用器优化设计  

Optimal Design for an Etched Diffraction Grating for Obtaining a Flat-top Spectral Response

作　　者：宋军[1] 何赛灵[1] 石志敏[1] 

机构地区：[1]浙江大学现代光学仪器国家重点实验室,光及电磁波研究中心,杭州310027

出　　处：《光子学报》2003年第5期550-554,共5页Acta Photonica Sinica

基　　金：浙江省科技计划重大资助项目 (项目号 0 0 110 10 2 7)

摘　　要：本文对利用多模干涉 (MMI)结构实现解复用器蚀刻衍射光栅 (EDG)频谱平坦化的设计方法进行了改进 通过使用预展宽输入结构把带间串扰降到很低值 ;通过使用抛物线型多模干涉区 ,把带通纹波减小到接近于零的同时 ,大大增加了 1dB带宽 ,最终得到了平坦化效果最佳的设计方法 作为例子 。The optimal design for the input structure of an Etched Diffraction Grating is studied. A novel structure with a pre-expanded multimode interference (MMI) is proposed to obtain a flat-top spectral response with a reduced crosstalk. A parabola MMI structure is used to obtain lower ripple and larger 1dB effective passband. The design examples are analyzed and demonstrated with the Beam Propagation Method and the Mode Propagation Analysis. A new way for designing an EDG with a flattened spectral response by introducing a pre-expanded parabola MMI input structure is described.

关 键 词：平顶型蚀刻衍射光栅 波分复用器 优化设计 多模干涉 频谱 平坦化 光通信 

分 类 号：TN256[电子电信—物理电子学] TN929.1