光纤通信是七十年代崛起的新技术,由于它传输带宽、容量大、抗雷击、抗电磁干扰、保密性强、施工敷设方便、材料资源丰富等无可比拟的优越性,已成为通信领域中最活跃、最富有生命力的通信方式。近几年来,美、日、英、法、加拿大、西德、荷兰等经济发达国家已迈出实验室,开始了实用化的实验和研究。到目前为止,世界上已有100多个系统在现场实验和使用。各国铁 Optical fiber communication is a new technology emerging in the seventies. Due to its unparalleled advantages such as transmission bandwidth, large capacity, anti-lightning, anti-electromagnetic interference, confidentiality, convenient laying of materials and abundant material resources, optical fiber communication has become a The most active and most viable means of communication. In recent years, the United States, Japan, Britain, France, Canada, West Germany, the Netherlands and other economically developed countries have taken the laboratory, began practical experiments and research. So far, more than 100 systems in the world have been tested and used in the field. National iron