多模干涉型光耦合器研究

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摘要................................................................................................................................ I Abstract ......................................................................................................................... II 1 绪论............................................................................................................................ 1 1.1 耦合器背景简介.................................................................................................... 1 1.2 本文内容简介......................................................................................................... 2 2 多模干涉型光耦合器在光通信中的应用.............................................................. 3

2.1 MMI光开关 ..................................................................................................... 3 2.2 MMI型1×N光功分器 .................................................................................... 4 2.3 MMI型2波长波分复用器 ............................................................................. 5 2.4 MMI型阵列波导光栅复用器/解复用器 ........................................................ 6 3 多模干涉器件原理.................................................................................................. 8

3.1 导模传输分析法.............................................................................................. 8 3.2 多模干涉耦合器光场的讨论........................................................................ 10 3.3 多模干涉一般成像分析................................................................................ 15 4 多模干涉耦合器性能分析...................................................................................... 25

4.1 MMI耦合器参数分析 ................................................................................... 25 4.2 MMI器件输入输出光场分析 ....................................................................... 28 5 总结及展望............................................................................................................ 31 致谢............................................................................................................................ 32 参考文献：.................................................................................................................. 33

摘要

当今的光通信系统正朝着高速率、大容量方向发展，研究性能优良的集成光学器件已经成为人们的迫切需要解决的问题。多模干涉（MMI）光耦合器以其结构紧凑、低的插入损耗、频带较宽、制作工艺简单、容差性好以及对偏振不敏感等特点，已经越来越多的应用于光通信系统中。

本文首先介绍了多模干涉耦合器在光通信系统中的应用，然后介绍了分析多模干涉原理的理论：导模传输分析法，然后再在导模传输分析法的基础上分析了多模干涉的基本原理；并在介绍理论后分析了多模干涉耦合器的成像位置及相关规律，并简要探讨了多模干涉耦合器相关参数对MMI区长度的影响；最后以1×2、1×4多模干涉耦合器为例分析了MMI区长度对输出光场的影响。

关键词：多模干涉导模分析法成像位置 MMI区长度

Abstract

Along with the development of optical communication systems toward high-speed and large-capacity, the development of high-performance integrated optical components has already become people's urgent demanded, The multimode interference optical coupler has obtained more and more widespread application for its compact structure, wide band and polarization insensitive characteristics.

This paper introduces the multi-mode interference coupler in optical communication system，then introduces the principles of the theory of multimode interference：modal propagation analysis(MPA). Then analysis of the basic principle of multimode interference based on the modal propagation analysis. And analyzed the multi-mode interference couplers and related laws of the imaging position principles. And we discussed the multi-mode interference coupler’s parameter influence for the length of MMI. Finally ,1×2,1×4 multimode interference MMI coupler as an example of the output light field.

Keywords: multimode interference modal propagation analysis (MPA)

Imaging position length of MMI