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美国IBM T.J.Watson研究中心(位于新泽西州霍索恩)已经开发出并演示了他们称作第三代光波网络的样机。IBM之所以把彩虹Ⅰ号(Rainbow I)这一样机网络归类为第三代网络,是因为该网络采用了许多种波长和光信号处理技术,并且利用了光纤的宽带宽潜力。 Rainbow I采用了波分复用接口(WDMA)、32个节点的无源光纤结构,在该结构中所有节点都能互通。每个节点的工作速率为200Mb/s,实现WDMA方案的关键是Micron光学公司(佐治亚特兰大)生产的纯光纤可调式法布里-珀罗器件,它可以滤掉无关的信号并能锁定住从WDMA网络所采用的许多紧密
The IBM T. J. Watson Research Center in Hawthorn, NJ has developed and demonstrated prototypes they call the third generation of optical networks. The reason why IBM classifies the Rainbow I prototype network as a 3G network is due to the many wavelength and optical signal processing techniques used in the network and takes advantage of the wide bandwidth potential of optical fiber. Rainbow I uses Wavelength Division Multiplexing Interface (WDMA), a 32-node passive fiber structure in which all nodes are interoperable. Each node operates at 200Mb / s. The key to implementing the WDMA solution is a pure fiber-tunable Fabry-Perot device from Micron Optical (Atlanta, GA) that filters out irrelevant signals and locks them in from Many of the uses of WDMA networks are tight