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上一世纪的最后10年,光传输技术的飞速发展无疑是通信领域最令人激动的事件之一。其直接影响是传输带宽价格的成倍下降。1995年,人们还在讨论2.5Gbit/s的SDH传输系统的巨大带宽有无业务需求问题,可是仅仅过了短短的4年,1999年32×10Gbit/s的WDM设备已经商用化了。这是因为传输价格的下降大大推动了业务需求的增长。而且这一良性循环还将持续下去。朗讯公司光网络部的桑多·安诺夫(Sando Anoff)先生在《光网络的未来》一文中预测:未来,每根纤细的光纤上的传输速度可达到不可思议的200兆兆比特/秒,相当于可以同时承载30多亿个电话呼叫。这确实令人惊讶。那么光网络将在未来通信网络中处于何种地位,是什么技术将位于信息高速公路的核心?桑多·安诺夫先生通过这篇文章展望未来,并从应用、体系和接入三个主要方面透视了光网络的发展趋势。本期刊出该文,以飨读者。
In the last decade of the last century, the rapid development of optical transmission technology is undoubtedly one of the most exciting events in the field of communications. Its direct impact is the doubled drop in transmission bandwidth prices. In 1995, people were still discussing the huge bandwidth of 2.5Gbit / s SDH transmission system with or without service requirements. However, in just four years, 32 × 10Gbit / s WDM devices were commercialized in 1999. This is because the decline in transmission prices has greatly contributed to the growth of business needs. And this virtuous cycle will continue. Sando Anoff, of Lucent’s Optical Networks Division, in his article “The Future of Optical Networks,” predicts that in the future speeds of up to 200 terabits per second will be transmitted per slender fiber, Equivalent to carrying more than 3 billion phone calls simultaneously. This is indeed surprising. So what is the status of optical network in the future communication network, what technology will be located in the core of the information superhighway? Through this article, Mr. Sandoanov looked into the future, and from the three major applications, systems and access Perspectives on the development trend of optical networks. This issue of the article to readers.