光子晶体光纤超连续谱高阶孤子分裂的数值模拟  

Numerically Simulate of the High-order Soliton Fission in the Experiment of Supercontinuum Generation in Photonic Crystal Fibers

作　　者：李坤[1] 郑义[1] 杜海龙[1] 傅修远[1] 闫昕[1] 

机构地区：[1]郑州大学河南省激光与光电信息技术重点实验室,河南郑州450052

出　　处：《激光与红外》2008年第7期680-683,共4页Laser & Infrared

基　　金：国家自然科学基金项目(No.60478021)资助

摘　　要：基于高阶非线性薛定谔方程,利用分布傅里叶方法(SSFM)数值模拟了高阶孤子在光子晶体光纤反常色散区中的传输。从脉冲形状和频谱两个方面分析讨论了三阶色散、自陡峭效应和脉冲内拉曼散射对高阶孤子传输的影响。计算结果表明:高阶效应使高阶孤子的演化不再具有周期性特性。其中,对高阶孤子分裂起主导作用的是三阶色散和孤子内拉曼散射。高阶效应均使最终频谱得到了不同程度的展宽。Based on the high-order nonlinear Schrti dinger equation,the propagation of high-order solitons in the anomalous dispersion region of photonic crystal fibers （PCF） is numerically simulated by making use of the split-step Fou- rier method （SSFM）. From pulse shape and spectrum, the influences of the third-order dispersion, self-steepening and intrapulse stimulated Raman scattering on the propagation property of the high-order solitons are analysed. The results show that the high-order effects destroy the periodicity of high-order solitons evolution. Among them, the third-order dispersion and intrapulse stimulated Raman scattering play a leading role in the fission of the high-order solitons. And the high-order effects always broaden the ultima spectrum at different levels.

关 键 词：光子晶体光纤 高阶孤子 超连续谱 色散 自陡峭 孤子内拉曼散射 

分 类 号：O43[机械工程—光学工程]