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.
出处
《激光技术》
CAS
CSCD
北大核心
2006年第2期209-211,220,共4页
Laser Technology
关键词
光纤光学
超高斯光脉冲
单模光纤
三阶色散
啁啾
fiber optics
super-Gausslan optical pulse
singie-mede optical fiber
the third-order dispersion
chirp
