一种具有放大功能的多通道窄带滤波器设计  

Design of Multi-Channel Narrow Band Filter with Gain

作　　者：杨广[1] 梁瑞生[1] 罗仁华[1] 刘颂豪[1] 

机构地区：[1]华南师范大学信息光电子科技学院,广东广州510006

出　　处：《中国激光》2009年第5期1105-1110,共6页Chinese Journal of Lasers

基　　金：国家978计划(2007CB307001)资助课题

摘　　要：设计了传统介质(折射率为n1>0)与激活介质(折射率n2=n0-ki)交替排列组成的一维光子晶体(PC)。利用传输矩阵法研究了这种光子晶体的透射光谱,模拟结果显示,n1=1.45,n2=3.8-0.10i时会出现两条半峰全宽约0.6 nm获得增益的透射窄带,并且两条窄带的中心波长只与介质的厚度有关。用M×N个厚度不同的此类光子晶体为单元设计了一种具有放大功能的M×N阵列滤波器。研究了介质厚度和折射率的变化对滤波器通道透射窄带的影响。结果表明,此滤波器在可见光区域和红外光区域分别有M×N个通道,并且通道间隔和窄带透射率的大小都可以通过改变介质参数任意调节,这为设计各种需要的滤波器提供了帮助。A type of one-dimensional photonic crystal （PC） with traditional medium （refractive index n1〉0） and active medium （refractive index n2 = n0 - ki） alternant multilayer is designed. Its transmission spectrum is studied by transfer-matrix method. Simulation results show that it has two narrow transmission bands amplified whose halfwidth values are both about 0.6 nm with n1=1. 45 and n2 =3.8-0.10i, and the corresponding central wavelengths are only up to the thickness of the medium. An M× N matrix filter with gain is designed using M × N PC units with different thickness. The affection of thickness and refractive index of the mediums on the channels of this filter is investigated. The results reveal that the spacing and transmittivity of the channels, which are located in region of visible and infrared light, could be adjusted by changing the parameters of mediums. This will help the needed filter design.

关 键 词：光电子学 光子晶体 传输矩阵法 滤波器 激活介质 

分 类 号：TN713.5[电子电信—电路与系统]