飞秒脉冲在光子晶体光纤中的传输特性  

Propagation characteristics of femtosecond pulse in photonic crystal fiber

作　　者：车雅良[1] 隋展[2] 雒开彬[3] 李明中[2] 王建军[2] 杨义胜[4] 李晓峰[1] 黄小东[2] 许党朋[2] 

机构地区：[1]电子科技大学物理电子学院,成都610054 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [3]西安通信学院,西安710106 [4]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《强激光与粒子束》2008年第2期193-196,共4页High Power Laser and Particle Beams

基　　金：国家高技术发展计划项目

摘　　要：基于广义非线性薛定谔方程,利用分步傅里叶法数值模拟了超高斯时间分布的飞秒脉冲在光子晶体光纤中的传输特性。结果表明:超高斯脉冲比高斯脉冲在更短距离内形成孤子衰变,而且出现比强孤子功率稍低的次峰,孤子自频移更显著;另外,三阶色散会导致脉冲波形及频谱不对称,出现精细结构,并且有形成孤子的趋势;脉冲内拉曼散射对脉冲有平滑作用;自陡改变了主峰与次峰之间的能量分配。Based on the generalized nonlinear Schrodinger equation, the propagation characteristics of a super Gaussian femtosecond pulse in photonic crystal fibers were numerically simulated by split-step Fourier method. The result shows that soliton disintegration occured in shorter distances and soliton self-frequency shift was more remarkable for super Gaussian pulse than for Gaussian pulse, and a new lower power soliton appeared on the left side of the strong soliton. Otherwise, the 3rd-dispersion would lead to the dissymmetry and the complex structure for the pulse shape and its spectrum, and that would lead to the trend to form soliton. The pulse shape was smoothed by intrapulse stimulated Raman scattering. At the same time the energy between the two solitons was redistributed by self-steeping.

关 键 词：飞秒脉冲 光子晶体光纤 孤子衰变 孤子自频移 

分 类 号：TN929.11[电子电信—通信与信息系统]