The Evolution Trend of Optical Core Network  

作　　者：Mao Qian Wuhan Research Institute of Posts and Telecommunications,Hubei, Wuhan, 430074 China 

出　　处：《China Communications》2008年第1期4-8,共5页中国通信（英文版）

摘　　要：Optical network is the infrastructure of telecommunicationnetwork. More than 95% of information istransported over optical network in China, wherecore network is the main trunk. How to increase thebit rate of the single wavelength channel, raise thetotal capacity of the DWDM system, extend theoptical transportation distance of electrical repeaterfree of the DWDM system and optical network intelligenceare key problems demanding high attention.The evolution trend of the optical core network isdescribed with some examples in this paper.Optical network is the infrastructure of telecommunication network. More than 95% of information is transported over optical network in China, where core network is the main trunk. How to increase the bit rate of the single wavelength channel, raise the total capacity of the DWDM system, extend the optical transportation distance of electrical repeater free of the DWDM system and optical network intelligence are key problems demanding high attention. The evolution trend of the optical core network is described with some examples in this paper.

关 键 词：OPTICAL CORE NETWORK DWDM UHS ULC ULH ASON 

分 类 号：TN929.1[电子电信—通信与信息系统]