DWDM波长转换技术在超长距SDH传输网中的应用  

Application of DWDM wavelength conversion technology in ultra long haul SDH transmission network

作　　者：王红军 薛惠明 

机构地区：[1]徐州供电公司,江苏徐州221005

出　　处：《电力系统通信》2007年第B06期14-16,共3页Telecommunications for Electric Power System

摘　　要：SDH光信号在超长中继距离传输中存在信噪比下降的问题。文章介绍了在500kV东明开关站至三堡变光通信工程实施中,采用DWDM波长转换技术克服这一难题的成功经验。通过案例可以看出,在超长中继距离SDH光通信线路中,锁定SDH输出信号的中心频率并在接收端采用光过滤器对噪声进行抑制,是解决信噪比下降、保证传输质量的有效办法。In ultra long haul transmission cases, the SNR of SDH optical signal will decrease. This paper introduces a successful example of overcoming this problem by using the technology of DWDM wavelength conversion in optical fiber communication engineering from Dongming to Sanbao 500 kV substations. The practical example shows that locking the centre frequency of SDH output signal and restraining noise with optical filter in receiver can effectively improve SNR and guarantee the transmission quality.

关 键 词：超长距光通信 同步数字系列 密集波分复用 光信噪比 

分 类 号：TN929.1[电子电信—通信与信息系统]