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上世纪90年代初期,随着光传输设备、光缆技术的成熟和商品化,光纤传输系统逐步替代长距离电缆传输干线,应用到模拟有线电视系统。而1550nm光传输系统以其技术指标高、光纤损耗小、可用EDFA 进行接力放大等诸多优点,在有线电视信号长距离传
In the early 90s of last century, with the maturity and commercialization of optical transmission equipment and optical fiber cables, optical fiber transmission systems gradually replaced long-distance cable transmission mains and applied to analog cable television systems. The 1550nm optical transmission system with its high technical indicators, low optical loss, available EDFA relay amplification and many other advantages of long-distance transmission in the cable signal