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当前,光通信技术正以超乎人们想象的速度发展,在过去的10年里,光传输速率提高了100倍,在未来10年里,预计还将提高100倍左右。而目前IP业务持续的指数式增长,给光通信的发展带来了新的机遇和挑战,一方面IP巨大的业务量和不对称性刺激了WDM(波分复用)技术的应用和迅猛发展,另一方面IP业务与电路交换的差异也对基于电路交换的SDH(同步数字体系)提出了挑战。光通信本身也正处在深刻的变革之中,特別是“光网络”的兴起和发展,在光域上可进行复用、解复用、选路和交换,可以充分利用光纤的巨大带宽资源,增加网络容量,实现各种业务的“透明”传输,而“光网络”和IP的结合——光因特网更是成了人们关注的焦
At present, optical communication technology is developing at a rate beyond the imagination of the people. Over the past 10 years, the optical transmission rate has increased by 100 times and is expected to increase by 100 times in the next 10 years. At present, the exponential growth of IP services has brought new opportunities and challenges to the development of optical communications. On the one hand, the enormous business volume and asymmetry of IP stimulate the application and rapid development of WDM (Wavelength Division Multiplexing) technology On the other hand, the difference between IP services and circuit switching also poses challenges for SDH (Synchronous Digital Hierarchy) based on circuit switching. Optical communications itself is also undergoing profound changes. In particular, the rise and development of “optical networks” allows the reuse, demultiplexing, routing and switching of optical networks to take full advantage of the enormous bandwidth of optical fibers , Increase the capacity of the network and realize the “transparent” transmission of various services. The combination of “optical network” and IP - the optical Internet has become the focus of people’s attention