啁啾归零码在光纤中传输性能的仿真研究  

Simulation of Transmission Performance of Chirped RZ Code in Fiber

作　　者：陈琦玮[1] 邵钟浩[2] 

机构地区：[1]常熟理工学院物理与电子工程学院,江苏常熟215500 [2]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《计算机仿真》2009年第12期111-114,共4页Computer Simulation

摘　　要：高速光纤通信系统在传输容量得到增加的同时,面临着色散、非线性效应等日益突出的问题,成为影响光纤传输性能的主要因素。选择合适的调制码型,是提高通信传输质量的有效途径。在介绍啁啾归零码的生成和频谱特性的基础上,通过分析光纤传输模型,对CRZ码在取不同啁啾调制深度和不同色散补偿光纤长度下的系统性能作仿真分析。结果表明:采用合适的CRZ码将预啁啾技术和其他技术相结合可以提高高速传输系统的传输性能。High - speed optical transmission has larger capacity and wider band compared to conventional systems. But group velocity dispersion（GVD） and nonlinear optical effects become the major obstacles in these systems. Using correct modulation format based on the difference condition is a right choice for improving the performance of the systems. In the paper, a method of chirped return -to- zero（CRZ） code modulated generation was described, the CRZ code＇s characteristics on spectra domain were introduced, and the performance of the optical transmission systems using the CRZ code for different chirp modulation depth and different dispersion compensation fiber length were simulated and analyzed. The results indicated that choosing appropriate CRZ code combined with other technology can improve the performance of optical transmission systems.

关 键 词：啁啾归零码 系统性能 仿真 

分 类 号：TN929.11[电子电信—通信与信息系统]