光纤五阶非线性对高斯脉冲的压缩影响  

Effect of quintic nonlinearity on Gaussian-shaped pulse compression in fiber

作　　者：王永祥[1] 

机构地区：[1]宜春学院物理科学与工程技术学院,江西宜春336000

出　　处：《激光杂志》2008年第2期55-56,共2页Laser Journal

摘　　要：根据含五阶非线性微扰修正项的非线性Schrdinger方程,采用变分法,导出了光纤中高斯脉冲各参数随传输距离演化的微分方程组,用龙格—库塔算法对该方程组进行了数值求解。数值结果表明:五阶非线性使高斯脉冲的脉宽压缩,可在一定程度上抵消初始啁啾对脉宽的展宽作用,五阶非线性还可减小高斯脉冲频率、相位的抖动,因而适度的五阶非线性(γ=0.001-0.3)有利于高斯脉冲的稳定传输。Based on modified nonlinear Schrodinger equation including the effect of quintic nonlinearity （ MNLSE ） , by using the method of variational principle, deduces the evolution equations for the parameters of Gaussian - shaped pulse that transmits in fiber, calculates the evolution equations by using Range - kutta algorithm. The result indicates that quintic nonlinearity compresses the width and alleviates the shift of frequency and phase, so appropriate quintic nonlinearity （v = 0.001 - 0.3） is helpful to steady transmission of Ganssian - shaped pulse in fiber.

关 键 词：纤维与导波光学 脉宽压缩 变分法 高斯脉冲 龙格-库塔算法 

分 类 号：TN248.1[电子电信—物理电子学]