一、前言光纤通信是通信领域中最年青的一门通信技术。1966年,英籍华人高锟最早提出用玻璃纤维作为长距离通信的传输介质。由于当时的玻璃纤维传输损耗太大,故这种传输介质未引起人们多大的兴趣和关注。但是从美国康宁玻璃公司1970年研制出损耗低于 I. Introduction Optical fiber communication is the youngest communication technology in the field of communication. In 1966, Charles Kao, a British Chinese, first proposed using glass fiber as the transmission medium for long-distance communications. Due to the fiberglass transmission losses at that time were too large, so this transmission medium did not cause much interest and concern. But Corning Glass from the United States in 1970 developed less than loss