一种具有光放大功能的滤波器设计  

Design of a Filters with Optical 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,广州510006

出　　处：《半导体光电》2009年第3期371-373,399,共4页Semiconductor Optoelectronics

基　　金：国家重点基础研究发展规划(973)项目(2007CB307001)

摘　　要：设计了包含缺陷层和多层异质结构的混合结构的一维光子晶体，然后在光子晶体中加入泵浦源。用传输矩阵法研究了加入泵浦源前后光子晶体的透射谱，结果发现该混合结构的光子晶体具有非常宽阔且平坦的禁带，且在此禁带内只有一条极窄的透射带，加入激励源后的透射带透射率远远大于1，并且透射带的透射率和位置都可以通过调节光子晶体的参数来改变。利用这些特性，设计了一种具有放大功能的宽禁带超窄单通滤波器，当激活系数取0．0334时，在1000～2000nm的禁带范围内只有在红外波段1550nm处出现一条透射率为1．1×10^6，3dB带宽为0．005nm的透射窄带。One-dimensinal hybrid layers with multiple heterostrctures are Its transmission spectrum, before and structure photonic crystals（1-D PCs） combining defect designed and then pump source is pulled in this 1-D PCs. after pump source, is studied by using transfer-matrix method. The results show that the PCs have broad-flat forbidden band in which only one ultranarrow transmitted band exists. The transmittivity of the transmitted band is larger more than 1 when the pump source is pulled in and the transmittivity and postion of the transmitted band could be adjusted by changing the parameters of PCs. Using these characteristics, broad non- transmission and ultra-narrow single band-pass filters with Gain is designed. This filter, among the forbidden band of 1 000-2 000 nm, has one transmitted band with a transmittivity of about 1.1× 10^6 and a 3 dB bandwidth of 0. 005 nm only at the infrared 1 550 nm in the infrared band when the activity coefficient is chosen to be 0. 033 4.

关 键 词：光子晶体 滤波器 激活介质 

分 类 号：O431[机械工程—光学工程]