硅基光波导中啁啾高斯脉冲在反常色散区的传输特性  

Transmission characteristics of chirped Gaussian pulses in the anomalous dispersion region of silicon-on-insulator waveguides

作　　者：王红玉 贾维国 刘振 门克内木乐[2] WANG Hong-Yu;JIA Wei-Guo;LIU Zhen;MENKE Neimule(School of Physical Science and Technology,Inner Mongolia University,Hohhot 010021,China;Ordos College,Inner Mongolia University,Erdos 017000,China)

机构地区：[1]内蒙古大学物理科学与技术学院,呼和浩特010021 [2]内蒙古大学鄂尔多斯学院,鄂尔多斯017000

出　　处：《原子与分子物理学报》2021年第1期105-111,共7页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(61167004)。

摘　　要：本文利用激光脉冲在硅基光波导(SOI)中传播时满足的非线性薛定谔方程,采用分步傅里叶变换,数值模拟了硅基光波导中啁啾高斯脉冲在反常色散区的传播特性.通过模拟发现,三阶色散正负主要决定了脉冲的振荡波形性质,克尔效应与双光子吸收对脉冲波形起调制作用,自由载流子效应则可以忽略.初始啁啾参数的正负存在影响了脉冲的振荡强弱变化和脉冲中心的漂移的趋势,并且无论是正啁啾还是负啁啾,脉冲振荡与漂移都随着啁啾的增大而更加剧烈,同时啁啾正向增大与负向增大,都将导致脉冲展宽越严重致主峰峰值越低.We numerically simulate the transmission characteristics of the Gaussian pulses in silicon-on-insulator(SOI) waveguides using the split-step Fourierm method with MATLAB. Through the simulation,it is found that the oscillation property of Gaussian pulse is mainly determined by third-order dispersion. Kerr effect intensifies the oscillation and drift of the pulse and causes the pulse compression,two-photon absorption results in a decrease in pulse peak power and a faster decrease over short distances and the free carrier effect is negligible. The existence of initial chirped parameters affects the oscillation strength and the drift of pulse center. Regardless of whether chirp is positive or negative,the main peak of the Gaussian pulse is decreasing. When the initial chirp coefficient increases positively or negatively,the oscillations of the pulses are more intense,and the drift of the pulse center is more obvious.

关 键 词：硅基光波导 高斯脉冲 啁啾 反常色散区 

分 类 号：O437[机械工程—光学工程]