DWDM中基于预啁啾抑制FWM的优化策略  

Optimized strategy for FWM suppression based on pre-chirp in DWDM

作　　者：王雨行 关莉珍 宋锡策 闫煜鹏 余先伦[1] WANG Yu-hang;GUAN Li-zhen;SONG Xi-ce;YAN Yu-peng;YU Xian-lun(School of Electronics and Information Engineering,Chongqing Three Gorges University,Chongqing 404020,China)

机构地区：[1]重庆三峡学院电子与信息工程学院,重庆404020

出　　处：《激光与红外》2024年第8期1329-1336,共8页Laser & Infrared

基　　金：国家重点研发计划项目(No.2021YFB3901405);国家自然科学基金项目(No.U2030116);重庆市重点实验室“三峡库区地质环境监测与灾害预警”项目(No.YB2020C0301)资助。

摘　　要：为了满足波分复用系统中的超高速和长距离传输,需将影响频谱效率和系统性能的四波混频等非线性效应损害降至最低。针对四波混频产生机理,提出了一种抑制波分复用光网络中四波混频效应的方法。该方法分别在有无预啁啾的情况下确定了第一、第二和第三优化优先级参数(如有效面积、信道间距、入纤功率)的单个和组合效应对四波混频效应的影响,对系统误码率进行数值计算,分析系统性能。在16信道系统中,随着有效面积的增加、输入功率的减小和信道间距的增加,光纤中的四波混频效应得以降低,且在预啁啾情况下四波混频效应降至更低。在预啁啾为800 ps/nm时,三种参数优化组合使信道中的最小误码率为8.16×10^(-23),相比无参数优化和预啁啾的光纤通信系统,性能提升132.8 dB。最后,这项工作表明,所提出的基于预啁啾的参数优化策略是密集波分复用系统性能优化的理想方案。In order to meet the requirements of ultra high speed and long-distance transmission in wavelength division multiplexing systems,it is necessary to minimize the damage caused by nonlinear effects such as four-wave mixing that affect spectral efficiency and system performance.In this paper,a method is proposed to suppress the four-wave mixing effect in wavelength division multiplexing optical networks based on the mechanism of four-wave mixing.This method determines the individual and combined effects of the first,second,and third optimization priority parameters(such as effective area,channel spacing,and fiber input power)on the four wave mixing effect with or without pre-chirp,and performs numerical calculations on the system bit error rate to analyze system performance.In 16 channel system,as the effective area increases,input power decreases,and channel spacing increases,the four-wave mixing effect in the fiber optic is reduced,and the four-wave mixing effect decreases even lower under pre-chirp conditions.When the pre-chirp is 800ps/nm,the optimal combination of three parameters results in a minimum bit error rate of 8.16×10^(-23) in the channel compared to fiber optic communication systems without parameter optimization and pre chirp,the performance of the system is improved by 132.8 dB.Finally,this work indicates that the proposed parameter optimization strategy based on pre-chirp is an ideal solution for optimizing the performance of dense wavelength division multiplexing systems.

关 键 词：光纤通信 四波混频 预啁啾 信道间距 入纤功率 有效面积 

分 类 号：TN929.11[电子电信—通信与信息系统] O436[电子电信—信息与通信工程]