余弦-超高斯脉冲的演化特性研究  

Investigation of the cosine-super Gaussian pulses evolution

作　　者：邹德峰[1] 李晓辉[1] 柴通 Zou Defeng;Li Xiaohui;Chai Tong(School of Physics&Information Technology,Shaanxi Normal University,Xi’an,Shaanxi 710119,China)

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710119

出　　处：《光电工程》2018年第10期170673-170678,共6页Opto-Electronic Engineering

基　　金：国家自然科学基金(61605106);中国科学院瞬态光学与光子学国家重点实验室开放性研究基金(SKLST201401);陕西师范大学启动基金(1112010209;1110010717)资助~~

摘　　要：本文研究了余弦-超高斯(CSG)脉冲在光纤中的演化特性并对CSG脉冲在光纤中的传输过程进行了数值研究。得到了脉冲的初始相位φ0和脉冲阶数m对脉冲传输过程及其演化规律的影响。结果表明,增大φ0值到80 rad时的一阶余弦-超高斯脉冲可以在相对较长的光纤中实现脉冲压缩;而高阶余弦-超高斯脉冲在经历较短的脉冲压缩后,随即展宽。脉冲阶数越高,其脉冲压缩所经历光纤长度越短。本文还将余弦-超高斯脉冲、简单高斯脉冲和双曲正割脉冲进行对比,对比结果表明双曲正割脉冲展宽速度最快,简单高斯脉冲次之,而余弦-超高斯脉冲的展宽速度最慢。所提出的余弦-超高斯脉冲对光纤色散不敏感,该研究对于实际中要得到大容量,长距离通讯用的特殊脉冲的研究提供了一定的理论依据。The evolution of cosine-super Gaussian(CSG)pulses propagating in a conventional single mode fiber(SMF)has been proposed.The propagation properties of CSG pulses are numerically studied by using split-step Fourier method,and the effects of initial phaseφ0 and order of the pulse m are analyzed.Results show that whenφ0 is increased to 80 rad,the first order CSG pulse will be compressed in a relatively long fiber,and then broaden monotonically;the higher order CSG pulses will experience a short compression first,and then broaden monotonically.In addition,the CSG pulses are compared with simple Gaussian pulses and Hyperbolic secant pulses.The results indicate that the Hyperbolic secant pulse broaden fastest;the simple Gaussian pulse broaden secondly;CSG pulses broaden slowest,which is most insensitive to the dispersion of fiber.The research work will pave a way to realize a special pulse in large-capacity,and long-range communications.

关 键 词：光纤 余弦-超高斯脉冲 光纤色散 演化 CSG 

分 类 号：O437[机械工程—光学工程] TN253[理学—光学]