Kerr色散和内Raman散射对孤子传输特性的影响  

Influence of Kerr dispersion and intrapulse Raman scattering on propagation characteristics of solitons

作　　者：黄峻堃 张少武 HUANG Junkun, ZHANG Shaowu(College of Physics and Electronic Science, Hubei Normal University, Huangshi 435000, China)

机构地区：[1]湖北师范大学物理与电子科学学院,湖北黄石435000

出　　处：《量子电子学报》2018年第2期204-208,共5页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金;11404108;湖北师范大学2015年优秀中青年创新团队项目资助;T201502~~

摘　　要：采用变分法求解了包含由Kerr色散项、脉冲内Raman散射引起的自频移(SFS)项的高阶非线性薛定谔方程.推导了不同参数下高斯脉冲参量随传输距离的演化方程,得到了脉宽与振幅、脉宽与啁啾之间的约束关系.结果表明在合适的参数设定下孤子中心频率不变,不产生抖动;特定条件下自频移项和Kerr色散效应相互抵消,脉冲在一定距离内以呼吸子的形式稳定传播。Higher order nonlinear Schr6dinger equation including Kerr dispersion term, self-frequency shift （SFS） term caused by intrapulse Raman scattering is solved by variational method. Evolution equations of Gaussian pulse parameters with propagation distance under different parameters are derived. Constraint relations between pulse width and amplitude, pulse width and chirp are obtained. Results show that the soliton center frequency does not change under the appropriate parameter setting and there＇s no ,jitter. Under certain conditions, the self-frequency shift and Kerr dispersion effects cancel out each other, the pulses propagate stably in the form of breather within a certain distance.

关 键 词：非线性光学 非线性薛定谔方程 高斯脉冲 变分法 自频移 Kerr色散 

分 类 号：O437.3[机械工程—光学工程]