Compton散射对等离子体中亚皮秒超高斯脉冲传输特性的影响  

Influences of Compton scattering on the propagation properties of sub-picosecond super-Gaussian pulse in plasma

作　　者：禹定臣[1] 郝东山 

机构地区：[1]黄淮学院信息工程学院,河南驻马店463000 [2]郑州工业应用技术学院信息工程学院,河南新郑451150

出　　处：《光学技术》2014年第5期410-415,共6页Optical Technique

基　　金：河南省基础与前沿技术研究资助项目(092300410227);河南省教育厅科学技术研究重点项目(12B520063)

摘　　要：应用多光子非线性Compton散射模型、非线性薛定谔方程及龙格-库塔算法和变分法,研究了Compton散射对亚皮秒超高斯脉冲在等离子体传输的影响,给出了该脉冲传输演化的修正方程,并进行了数值计算,结果表明:与Compton散射前相比,Compton散射使脉宽压缩程度和非线性效应增大,脉冲展宽降低,非线性增强效应有效地削弱了色散效应;使脉宽趋于最大和最小时频率抖动,啁啾不为0;使超高斯脉冲振幅、啁啾和脉宽随传输距离增大振荡演化加快,频率和相位呈线性关系的抖动,脉冲中心位置呈准线性关系;Compton散射对超高斯脉冲保形传输有重要影响。By using the model of multi-photon nonlinear Compton scattering,nonlinear Schrdinger equation,Rungekutta algorithm and variation method,the influences of Compton scattering on the propagation properties of sub-picosecond super-Gaussian pulse in plasma are studied.The revised equations of the propagation evolution of super-Gaussian pulse are given out,and the equations are computed by using numbers.The results show that the compressed degree of pulse width and nonlinear effect are increased by Compton scattering than before Compton scattering,pulse expansion width is decreased and dispersion effect is effectively decreased by the increased nonlinear effect.The frequency is quivered when the pulse width is reached maximum or minimum,the chattering is not a 0.The oscillation evolution of the amplitude of the super-Gaussian pulse is accelerated along with the increase of propagation distance,the oscillation evolutions of the chattering and pulse width are accelerated too,the linear relation quivering is appeared between the frequency and phase and propagation distance,the quasi-linear relation is appeared between the central place of pulse and propagation distance.The important influences to the conformal transmission of the super-Gaussian pulse are taken place by Compton scattering.

关 键 词：等离子体 亚皮秒超高斯脉冲 二阶和三阶色散 三阶和五阶非线性效应 变分法 龙格-库塔算法 多光子非线性COMPTON散射 

分 类 号：TN929.11[电子电信—通信与信息系统]