全光网络的发展

Development of Photonic Network

实现全光网络的关键之一是用光交换代替电交换,目前自动光交换网络已经实用化。为了解决电子瓶颈限制问题,实现全光交换,近几年在光交换中引入了光标记交换新技术,该技术的关键在于光标记的产生、提取和识别等方面,其中有两种新方法:前置光标记法和高强度光脉冲光标记法。全光网络将向智能自动光交换网络演进。

The key to the realization of pho-tonic network is to replace electrical switch with optical switch.Now,ASON has been avail able.To solve the electrical bottleneck prob lem and to realize photonic switch,new OLS technology was introduced in opti cal switch in recent years.The key technolo gy in OLS is the generation,acquisition and i-dentifica tion of optical label.There are two new methods:preset OLS and high intensity opti cal pulse OLS.Photonic network will e-volve to wards ASTN.