前言光纤通信是通信领域中最年青的一门技术,1977年后才在少数科学和工业发达的国家开始实用,然而纤维光学本身并不是一项新技术,早在1900年就有人提出过这种理论。但在以前,光纤的传输损耗大得惊人,通信界多数人对其实用价值还持怀疑态度。自康宁玻璃公司研制出低损耗的20分贝/公里光纤以后,光纤通信有了很大的进展,在 Introduction Fiber-optic communication is the youngest technology in the field of communications and became practical only in a handful of science and industrialized countries after 1977. However, fiber optics itself is not a new technology as it was proposed as early as 1900 theory. However, in the past, the transmission loss of optical fiber was staggering. Most people in the communications industry were still skeptical of its practical value. Since Corning Glass has developed a low-loss 20 dB / km optical fiber, there has been a great deal of progress in optical fiber communication.