光纤Bragg光栅全光调谐滤波器  

A New Tunable FBG Filter Based on Nonlinear Fiber Grating

作　　者：宋慧芳[1] 邱昆[1] 武保剑[1] 彭拥军[1] 

机构地区：[1]电子科技大学宽带与光纤传输与通信网技术教育部重点实验室,成都610054

出　　处：《电子科技大学学报》2008年第S1期35-39,共5页Journal of University of Electronic Science and Technology of China

摘　　要：针对非线性特性对光纤布拉格光栅禁带的影响进行了研究;对光栅在非线性作用下所呈现的Bragg波长偏移特性作了理论分析。仿真结果表明,随着输入信号功率的增大,光栅的布拉格波长向长波方向移动,反射峰值下降,反射带宽变窄。基于此原理提出了一种新的全光可调谐滤波方案,并对不同光栅参数下的输出波形和反射谱特性进行了比较。该方案通过控制光实现了对光纤布拉格光栅固有波长的调节,从而实现了全光可调谐滤波,仿真结果表明脉冲形状保持良好。In this paper, the nonlinearity-induced Bragg wavelength shift on the Bragg wavelength of fiber grating is simulated. It shows that, with the increase of the input power, the Bragg wavelength shiftes to infared wave band, the peak value of the reflection decreases, and the width of the reflection gap narrows. A novel tunable filter scheme based on the nonlinearity is presented. The effects of the main filter Bragg grating (FBG) parameters on the output waveshape and spectrum are analyzed. This all-optical f...

关 键 词：光纤光栅 滤波 非线性效应 可调谐 

分 类 号：TN713[电子电信—电路与系统]