40Gb/s光通信系统不同码型传输性能分析  

Performance evaluation of different formats in 40Gb/s optical communication system

作　　者：黄艳华[1] 强世锦[1] 

机构地区：[1]武汉职业技术学院通信工程系,武汉430074

出　　处：《光通信技术》2010年第7期31-34,共4页Optical Communication Technology

摘　　要：使用Optisystem仿真工具,对非归零(NRZ)、归零(RZ)、载波抑制归零(CS-RZ)和归零差分移相键控(RZ-DPSK)四种码型在40Gb/s单信道传输系统中的灵敏度、非线性效应和色散容忍度进行比较,并对标准单模光纤(G.652)中四种码型的单信道40Gb/s长距离传输进行了仿真,结果表明:CS-RZ具有更优的灵敏度和抗噪声能力,RZ-DPSK码具有更优的非线性容忍度。在较低入纤功率条件下,G.652光纤作为传输介质,CS-RZ系统的传输性能最优。By using Optisystem simulation software, NRZ,RZ,CS-RZ and RZ-DPSK four kinds of modulation format in the 40Gb/s single channel system, their spectra, sensitivity, nonlinear effects and dispersion tolerance are compared, and the 40Gb/s single channel transmission over G.652 fiber for each format is investigated. It could be shown that CS-RZ format has better sensitivity and ani-noise performance than the others, and RZ-DPSK format offers higher nonlinearity tolerance than the others. It shows that the transmission performance of CS-RZ is the best on the conditions of low input optical power.

关 键 词：光纤通信 调制格式 传输特性 仿真 

分 类 号：TN929.11[电子电信—通信与信息系统]