【作者】 施佳乐；

【导师】 薛燕陵；

【作者基本信息】 华东师范大学 ， 通信与信息系统， 2016， 硕士

【摘要】 随着互联网时代的来临,通信业务对于带宽的要求越来越高。波分复用技术能够充分利用光纤的巨大带宽,实现超大容量的通信业务,一经提出便受到广泛关注。波分复用技术的核心之一是波分解复用器。光子晶体滤波器作为一种新型的波分解复用器,目前面临的最大问题是如何有效地分离不同波长的光信号。本文研究了多通道光子晶体滤波器。针对如何有效分离不同波长光信号的问题,本文从光子晶体的基本构成出发,分析了各种不同原胞结构的光子晶体带隙,发现在正方晶格光子晶体中使用长方形介质柱能够获得最大的光子带隙。本文基于长方形介质柱的光子晶体设计了新型T-型环形腔滤波器。通过调节长方形介质柱的宽度、长宽比,本文实现了滤波器的调谐功能。最后本文通过拓展单通道滤波器结构,结合异质结构光子晶体的设计理念,设计出了等间距的四通道和六通道光子晶体滤波器,实现了比现有已发表结果具有更多通道、更高Q值的滤波效果。本文的创新之处在于：(1)发现了在正方晶格结构中由长方形介质柱组成的光子晶体具有最大的光子带隙,因此提出用长方形介质柱取代圆形、正方形、六边形等传统形状介质柱作为滤波器的基本构成单元；(2)基于长方形介质柱,首次利用T-型环形腔结构设计出符合CWDM"S+C+L"波段的波分解复用器标准的、具有高隔离度和高Q值的四通道光子晶体滤波器；(3)基于长方形介质柱,首次利用T-型环形腔结构设计出峰值波长间距为10nm、具有较高隔离度和高Q值的六通道光子晶体滤波器结构,实现了基于T-型环形腔结构的最多通道的等间距滤波。本文的研究为波分解复用器的制作提供了有价值的参考,对于波分复用技术的广泛应用具有一定的现实意义。更多还原

【Abstract】 With the advent of the Internet, people’s demands for bandwidth are becoming higher and higher in the communication service. WDM technology can make full use of the huge bandwidth of optical fiber, realize the large capacity of communication business. So WDM technology received extensive attention of people when it just put forward. Wavelength division multiplexer is one of the core technologies of WDM. As a new type of wavelength division multiplexer, the biggest problem confronting the photonic crystal filter is how to effectively separate the optical signals of different wavelengths.This paper focus on multi-channel photonic crystal filter. In view of the problem of how to effectively separate the optical signals of different wavelengths, begining with the basic structure of photonic crystal, this paper analyzes the photonic crystal bandgap of different cell structure.This paper finds that in square lattice photonic crystal, the maximum photonic bandgap can be obtained by using rectangular dielectri columns.Then in this paper, a new type of T-ring resonator filter is designed which is based on the photonic crystal of the rectangular dielectirc columns.By adjusting the width and aspect ratio of the rectangle dielectric column,the tuning function of the filter is realized in this paper. At the end of this paper, through the expansion of single channel filter structure, combined with the heterostructure photonic crystal design philosophy, this paper designs a four-channel photonic crystal filter with equal spacing and a six-channel photonic crystal filter with equal spacing, which achieves the filtering effect with more channels and higher Q value than the existing published results.The innovation of this paper lies in:(1) finding that in square lattice structure, the photonic crystal composed of rectangular dielectric columns has the largest photonic bandgap. Therefore this paper proposes to replace the circular shape,square shape, hexagonal shape and other traditional shape dielectric cylinders with rectangular dielectric columns as the basic structure of the filter. (2) Based on rectangular dielectric columns, this paper designs a four-channel photonic crystal filter by using the T-ring resonator structure for the first time, which complies with the CWDM demultiplexer standard of "S+C+L" waveband and has high isolation and high Q values. (3) Based on rectangular dielectric columns, this paper designs a six-channel photonic crystal filter of the peak wavelength spacing for 10nm, by using the T-ring resonator structure for the first time, which has high channel isolation and Q value. This makes the maximum channel spacing filtering of T-based ring cavity structure come ture. The research of this paper provides a valuable reference for the production of demultiplexer, and has a certain practical significance for the wide application of WDM technology.更多还原