(一)引言光纤通信的出现是七十年代通讯技术的一次重大突破。在过去的十年里,光纤通信技术的发展甚为迅速,美、日、西欧等国相继建立了一百多个光纤通信现场实验系统,对于光纤通信的技术性能和经济成本作了评定。本文辑录的,是美国、日本、英国、西 (A) Introduction Optical fiber communication is a major breakthrough in communications technology in the 1970s. In the past ten years, the development of optical fiber communication technology has been very rapid. More than 100 optical fiber field experiment systems have been established successively in the United States, Japan, Western Europe and other countries, and the technical performance and economic cost of optical fiber communication have been assessed. This article is recorded, the United States, Japan, Britain, West