单模光纤中高阶色散对超高斯光脉冲传播的影响  

Influence of higher-order dispersion on super-Gaussian optical pulse in the single-mode optical fiber

作　　者：曹涧秋[1] 陆启生[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院定向能技术研究所,长沙410073

出　　处：《激光技术》2006年第2期209-211,220,共4页Laser Technology

摘　　要：从光脉冲在光纤中传播所满足的非线性薛定谔方程出发,研究了三阶色散对具有不同啁啾的超高斯脉冲在光纤中传输特性的影响。数值模拟的结果表明,超高斯脉冲的波形演变和高斯脉冲有所不同,不但峰值能量经历了一个上升的阶段,而且拖尾振荡在初始阶段也经历了一个增强———减弱的过程。通过计算还发现,初始啁啾无论正负都会加剧三阶色散的影响,故在三阶色散不能忽略的情况下,通过初始啁啾来补偿色散的方法应该慎用。Based on the nonlinear Schroedinger equation used to describe the normalized amplitude evolution in the fiber,the influence of the third-order dispersion on the transmission characteristics of super-Ganssian optical pulse with different chirps in the fiber is studied numerically. The results show that the peak intensity of super-Gaussian optical pulse becomes higher at the beginning,and the taft experiences a process of strengthening, and then weakening, which are different from Gaussian optical pulse. The results also show that the initial chirps will strengthen the influence of the third-order dispersion, so the method to compensate the influence of dispersion by adjusting the initial chirps should be used carefully in the case that the influence of the third-order dispersion can＇t be ignored.

关 键 词：光纤光学 超高斯光脉冲 单模光纤 三阶色散 啁啾 

分 类 号：TN929.11[电子电信—通信与信息系统]