摘要
模拟仿真了一种新型编码的光通信系统,系统采用了双二进制码(DB Duo-binary)电信号作为调制信号,激光脉冲作为载波信号,用非相干外调制技术作为调制方式.软件模拟仿真结果显示,采用双二进制调制编码的光通信系统,光源发射功率为5 dBm,途中无光放大,在色散系数为17 ps/(nm.km),衰减系数为0.2 dB/km的单模光纤中,系统码元传输速率可达20 Gbit/s、传输距离20 km以上.采用双二进制编码技术的光通信系统比传统的光通信系统具有更大的传输容量、较低的误码率,并且在一定程度抑制了色散效应.
A novel simplex optical communication system based on duo -binary code was designed and simulated. Electrical -optical intensity modulation and duo -binary were adopted in the system. The results of software Gbit/s data was successfully transmitted over simulation showed that the single direction 20 20 km SMF with 5 dBm power penalty, dispersion = 17 ps/（nm - km）, attenuation 0. 2 dB/km in the system. It has larger transmission capacity, lower BER and better transmission chromatic dispersion allowance than the common one.
出处
《华南师范大学学报（自然科学版）》
CAS
2007年第3期74-78,共5页
Journal of South China Normal University(Natural Science Edition)
基金
教育部留学回国人员科研启动基金资助项目
关键词
光通信系统
双二进制码
外调制技术
模拟仿真
optical communication system
duo - binary
external modulation technology
simulation
