四阶色散对飞秒高斯脉冲传输的影响  

Influence of Fourth-order Dispersion on the Femtosecond Gaussian Pulse Propagation

作　　者：任志君[1] 王辉[1] 金伟民[1] 应朝福[1] 万旭[1] 

机构地区：[1]浙江师范大学信息光学研究所,浙江金华321004

出　　处：《光子学报》2007年第2期258-261,共4页Acta Photonica Sinica

基　　金：国家自然科学基金(60477039);浙江省教育厅科研项目(20050275)资助

摘　　要：推导了考虑二、三、四阶色散的高斯脉冲传输方程;利用计算机数值模拟的方法,研究了四阶色散(FOD)对飞秒高斯脉冲在单模光纤中传输特性的影响.模拟结果显示:只有在入射脉冲宽度窄到飞秒量级时,即对应传输速率很高的情况下,FOD对脉冲的影响才明显;FOD导致脉冲形状发生了畸变,畸变特点不同于二、三阶色散;随着初始脉宽逐渐减小,FOD所致的飞秒高斯脉冲畸变经历了一个脉冲仅仅展宽,到展宽脉冲的两翼出现“底座”,到展宽脉冲的两翼出现具有微小振荡“底座”的变化过程.The propagation equation of Gaussian pulse is theoretical derived considering second-, third-, fourth-order dispersion （FOD）. The influence of FOD on propagation properties of femtosecond Gaussion pulse in Single mode optical fiber is mostly considered. The numerical simulation results show that the influence of FOD towards pulse is obvious only when input pulse width is quantitatively femtosecond corresponding high-velocity transmission. The aberration characteristic of pulse shape coming of FOD is different from SOD and TOD. With input pulse width being gradually diminished, Femtosecond Gaussian pulse undergoes a variation from on.ly being broadened, to two sides of broadened pulse appearing a pedestal,then the pedestal having a small oscillation.

关 键 词：光纤通讯 飞秒高斯脉冲 四阶色散 底座 

分 类 号：TN929.11[电子电信—通信与信息系统]