边带耦合光子晶体滤波器反射谱特性分析  

Characteristics of reflection spectrum of side-coupled photonic crystal filter

作　　者：张兴娇[1] 肖永江[1] 文如泉[1] 

机构地区：[1]萍乡高等专科学校,江西萍乡337000

出　　处：《应用光学》2011年第6期1130-1133,共4页Journal of Applied Optics

摘　　要：为研究边带耦合光子晶体滤波器的性质,利用耦合模理论(CMT)和传输矩阵方法(TMM)分析了谐振器腔体的周期,Q值和腔体的个数对滤波器反射谱的影响。仿真结果表明:相移为nπ/2,反射谱才具有对称性;Q值增加,反射峰带宽减小;N增大,反射峰带宽相应增大,旁瓣也随之出现。针对为实现增加带宽而出现的旁瓣增加的现象,采用了类似一维光子晶体滤波器的方法啁啾和级联技术实现了旁瓣的抑制。为设计具体光子晶体滤波器提供指导和依据。To study the characteristics of side-coupled photonic crystal filter,the coupled mode theory（CMT） and the transfer matrix method（TMM） were used to analyze the dependence of the filter＇s reflection spectrum on the period of resonator,the value Q,and the number of cavities.The simulation result showed that the reflection spectrum was symmetrical when the phase shift was nπ/2,the bandwidth of reflection spectrum peak decreased as Q increased,and the bandwidth of reflection spectrum peak increased and the side lobe occurred at the same time as N increased.To overcome the increasing side lobe due to the increase of bandwidth,the chirp and cascade technology similar to one-dimensional photonic crystal filter was used to achieve sidelobe suppression.This work can be used for the design of the photonic crystal filter.

关 键 词：光子晶体滤波器 耦合模理论 传输矩阵方法 反射谱 

分 类 号：TN252[电子电信—物理电子学]