非线性光纤环镜中初始啁啾对光孤子的放大特性的影响  

Initial Chirp-Dependent Soliton Amplification in Nonlinear Optical Loop Mirror

作　　者：姚端正[1] 郭江涛[1] 陈苏[1] 

机构地区：[1]武汉大学物理科学与技术学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2008年第3期300-304,共5页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目(10704052)

摘　　要：基于非线性光纤环镜,研究了初始啁啾对基态光孤子放大特性的影响.运用分步傅里叶法对脉冲传输方程进行求解,并对计算结果进行了分析.结果表明:正啁啾对孤子脉冲的放大起到明显的增强作用,并且在50m左右的距离内,脉冲的放大与压缩效应同时存在;而负啁啾抑制孤子脉冲的放大,造成信号的衰减.通过研究初始脉冲的脉宽对孤子峰值的放大,证明了正啁啾对孤子脉冲的放大增强作用.The characteristics of initial chirp-dependent fundamental soliton amplification in nonlinear optical loop mirror （NOLM） has been studied. The pulse transmission equation is solved by using the split-step Fourier method. It is shown from the numerical simulations that the soliton pulse amplification can be enhanced by positive initial chirps and the efficient soliton amplification and compression still occur when the propagation distance is about 50 m. The negative chirp inhibits the effect of amplification and result in a significant attenuation of the signal. The effect of pulse width on soliton amplification has been studied. It has been proved that the soliton pulse amplification can be enhanced by positive initial chirps.

关 键 词：初始啁啾 非线性光纤环镜 超短孤子 分步傅里叶法 

分 类 号：O437[机械工程—光学工程]