光纤Bragg光栅非线性开关动态特性研究  

Dynamic characteristics of FBG nonlinear switch

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,四川成都610054

出　　处：《应用光学》2008年第6期978-983,共6页Journal of Applied Optics

基　　金：国家自然科学基金资助项目(60572008)

摘　　要：基于光纤Bragg光栅中脉冲演变遵循的非线性耦合模方程,数值分析了光纤Bragg光栅在禁带附近由非线性光学特性导致的Bragg波长偏移。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。进一步研究了基于此效应的全光自开关特性,结果表明:此开关的稳定时间短,并且输出脉冲形状保持良好。因此,这种具有高非线性系数的光纤光栅实现的全光开关在全光信号处理方面具有广泛的应用前景。Based on the nonlinear coupled mode equation governing the pulse evolution in fiber Bragg gratings （FBG）, the Bragg wavelength shift near the forbidden band caused by nonlinear optical characteristics was analyzed numerically. A simulation model was established to study the switching performance of FBG for different input powers. The simulation result shows that the Bragg wavelength of the grating moves to longer wavelength, the reflection peak decreases and the bandwidth becomes narrow when the input signal power increases. The characteristics of the all-optical switch based on this effect were investigated. And it shows that the stabilization period of the switch is short and the pulse wave-shape remains undistorted.

关 键 词：光纤光栅 非线性效应 全光开关 

分 类 号：TN253-34[电子电信—物理电子学]