自喇曼散射及二阶色散系数对三阶飞秒孤子的影响  

Effect of Self Raman Scatter and Second Order Dispersion Coefficient on the Third Order Femetosecond Soliton

作　　者：王志斌[1] 李志全[1] 刘洋[1] 杨红艳[1] 

机构地区：[1]燕山大学电气工程学院,河北秦皇岛066004

出　　处：《光学与光电技术》2008年第1期41-44,共4页Optics & Optoelectronic Technology

摘　　要：介绍了分步傅里叶数值方法的原理和步骤。通过数值模拟,得到随着自喇曼散射系数的增大,三阶飞秒孤子分裂的两个孤峰,左峰的超前越来越小,而右峰的延迟越来越大。从频谱上看,开始蓝移随着自喇曼散射系数的增大而增大,当增大到一定程度时,两边的频谱会中移。增加二阶色散系数,三阶飞秒孤子的裂化也会得到控制,在频域内表现为频谱中移变窄。The principle and process of the split-step Fourier method （SSFM） is introduced. Via numerical simulation, the simulation results show that the hastening of the left soliton of the two solitons splitting from a third order soliton will become more and more slowly and the delay of the right will become greater. We can see from the spectrum that blue shift will become bigger along with the self Raman coefficient hastening, and when it reaches a certain value, the both sides frequency elements will come back to the center. The split of third order soliton will be controlled when the second order dispersion coefficient becomes bigger. The spectrum become narrow in the frequency field.

关 键 词：飞秒孤子 高阶非线性薛定谔方程 分步傅里叶法 自喇曼散射 

分 类 号：TN929.11[电子电信—通信与信息系统]