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.
出处
《光通信技术》
CSCD
北大核心
2010年第7期31-34,共4页
Optical Communication Technology
关键词
光纤通信
调制格式
传输特性
仿真
optical fiber communication, modulation format, transmission performance, simulation
