光子晶体光纤中脉冲俘获现象的研究  

A Study of the Phenomenon of Pulse Trapping in Photonic Crystal Fibers

作　　者：成纯富[1] 欧艺文[2] 别业广[1] 

机构地区：[1]湖北工业大学理学院,湖北武汉430068 [2]武汉工业学院工商学院,湖北武汉430065

出　　处：《湖北工业大学学报》2009年第1期77-81,共5页Journal of Hubei University of Technology

摘　　要：采用分步的傅立叶方法数值求解了耦合的非线性薛定鄂方程,模拟了双脉冲在光子晶体光纤中的非线性传输和俘获脉冲的产生.发现当泵浦脉冲在反常色散区进行泵浦,而信号脉冲在正常色散区入射,且两脉冲间满足初始群速度匹配或者接近匹配时,才观察到了脉冲俘获现象,其产生机制是随后产生的拉曼孤子脉冲与信号光之间的交叉相位调制作用.此外,也研究了各种入射激光参数对脉冲俘获的影响.当信号光和泵浦光靠近零色散点入射时,俘获效应越明显;当泵浦光的峰值功率增加时,孤子脉冲的红移现象越来越明显,被俘获的信号光成分也将逐渐产生蓝移.Using a standard split-step Fourier algorithm,the coupled nonlinear Schr dinger equations has been numerically solved.A theoretical investigation on the nonlinear propagation of two optical pulses and the trapped pulse generation in a photonic crystal fiber are presented.It is found the phenomenon of pulse trapping occurs when the pump pulse is input in the anomalous dispersion region while the signal pulse is input in the normal dispersion region and their group-velocity matching is satisfied or nearly sat...

关 键 词：光子晶体光纤 脉冲俘获 喇曼孤子 

分 类 号：TN253[电子电信—物理电子学]