Compton散射对五阶非线性下零色散附近调制不稳定性的影响  

Influences of Compton scattering on modulation instability near zero dispersion under quintic nonlinearity

作　　者：冯光辉[1] 郝东山[1] 

机构地区：[1]郑州华信学院信息工程系,河南新郑451100

出　　处：《光学技术》2011年第6期745-750,共6页Optical Technique

基　　金：河南省基础与前沿技术研究资助项目(092300410227)

摘　　要：应用多光子非线性Compton散射模型和非线性薛定谔方程,研究了Compton散射对五阶非线性零色散附近调制不稳定性的影响。将入射光和Compton散射光作为产生调制不稳定性的机制,分析了光纤损耗、四阶色散和五阶非线性对增益谱的影响。结果表明:散射下的正或负五阶非线性分别使零色散附近的增益谱宽和峰值比散射前增大得更大或减小得更小;四阶色散使增益谱宽比散射前宽,对负色散区增益谱的影响强于对正色散区的影响;但对两个区域的影响均不能忽略,这主要是由于散射使色散和非线性明显增大的缘故。Using the model of multi-photon nonlinear Compton scattering and nonlinear Schrodinger equation,the influences of modulation instability near zero dispersion under quintic nonlinearity produced by Compton scattering are studied.The influences of the gain spectra produced by the optical fiber loss,fourth-order dispersion and quintic nonlinearity are analyzed by using the mechanism of the modulation instability produced by the incident light and scattered light.The results show that the bigger width and crest value of the gain spectra near zero dispersion than before the scattering or the littler width and crest value are produced by the positive or negative quintic nonlinearity under the Compton scattering.The bigger widths of the gain spectra than the widths before the scattering are produced by the fourth-order dispersion,and its influence of the gain spectra to the negative dispersion area is the stronger than the positive dispersion area.Owing to the dispersion and nonlinearity are clearly increased by the scattering,therefore,the two influences can not be ignored.

关 键 词：调制不稳定性 四阶色散 五阶非线性 耦合 多光子非线性COMPTON散射 

分 类 号：TN252[电子电信—物理电子学] O437[机械工程—光学工程]