40G DWDM系统的关键技术  

The key technology of 40G DWDM

作　　者：陈浩祺[1] 

机构地区：[1]上海铁路局上海通信段传输网管室,上海200333

出　　处：《光通信技术》2011年第3期22-24,共3页Optical Communication Technology

摘　　要：简要介绍了40G DWDM系统的关键技术和可重构光分插复用器(ROADM)。40G DWDM系统主要面临克服信号速率提升而产生的色散和非线性效应。为此,系统应用了许多新技术如:新型调制编码技术、动态的色散补偿、超强的前向纠错(EFEC)及光纤喇曼放大器(FRA)等。传统的DWDM系统是静态的,无法实现光层调度和保护。ROADM可以使DWDM系统实现上下路波长的配置和调整,实现真正意义上的光层组网。The dense WDM systems are now upgrading from 10G to 40G/100G. This upgrading suffers from dispersion tolerance and nonlinear transmission disturbance.Several technologies are employed for solving those two problems. They are novel modulation formats, tunable dispersion compensation, EFEC and FRA. Furthermore, the traditional 10GDWDM system can＇t realize network scheduling and protection in optical layer.ROADM successfully solved this problem.The focus of this paper was set on the 40G DWDM optical transmission system＇s key technology and ROADM.

关 键 词：光双二进制码 eDQPSK DP-DQPSK 色散补偿 光纤喇曼放大器 重构光分插复用器 

分 类 号：TN929.11[电子电信—通信与信息系统]