摘要
理论并模拟仿真研究了基于级联马赫-曾德尔调制器与半导体光放大器生成的多载波光纤无线通信(ROF)系统.通过设置马赫-曾德尔调制器的偏置电压实现载波抑制,得到了奇数阶边带,再经过半导体光放大器(SOA)的非线性作用得到一定数量的载波.通过对马赫-曾德尔调制器参数的理论分析与模拟验证,增加由载波抑制得到的平坦载波的数量,进而在多载波系统中进一步增加由四波混频得到的载波数量.本文实现了70Gb/s的DMT(discrete multitones)信号的传输,并且验证了随着载波数量的增加,星座图旋转改善,系统性能得到提高,此结果表明,本方案仅采用两个器件级联的方法就可产生多个载波,不需要级联滤波器,并且随着载波数量的增加,使数据信号在光纤中的更高质量的传输,并且系统具有结构简单,易于实现,成本低等特点.
Radio-Over-Fiber(ROF)system based on m ulti-carrier which generated by cascading Mach-Zehnder modulator and semiconductor optical amplifier is theoretically analyzed and simulated.This method achieves carrier suppression and obtains odd-side band by setting the bias voltage of the Mach-Zehnder modulator,then through the semiconductor optical amplifier(SOA)non-linear effect gets a certain number of carriers.Based on the theoretical analysis and simulation of the Mach-Zehnder modulator parameters,the number of flat multi-carriers obtained by carrier suppression is increased,and the generation of m ulti-carrier can be improved.We realize the transmission of this system with the70Gb/s DMT(discrete multi-tones)signal and validate that the constellation map rotation make better and the system performance is improved as the number of carriers increases.The results show that this scheme can produce multi-carriers,in the mean time no cascading filters are required,and can achieve high-quality data transmission in the optical fiber by increasing of the number of carriers.This system is featured with having simple structure,easy realization and low cost.
作者
黄馨菂
卢嘉
王杨
常海悦
刘剑飞
HUANG Xindi;LU Jia;WANG Yang;CHANG Haiyue;LIU Jianfei(School of Electronics and Information Engineering, Hebei University of Technology Tianjin, 300401, China;Tianjin Key Laboratory ofElectronic Materials & Devices, Hebei University ofTechnology, Tianjin 300401, China)
出处
《河北工业大学学报》
CAS
2018年第1期25-31,共7页
Journal of Hebei University of Technology
基金
河北省自然科学基金(F2014202036
F2015202331)
天津市自然科学基金(15JCYBJC17000)
关键词
栽波抑制
四波混频
多栽波
光纤无线通信
carrier suppression
four-wave mixing
m ulti-carrier
radio over fiber
