光纤通信发展现状

The Development of Optical Communications

波分复用(WDM,Wavelength Division Multiplexing)、光纤接入网和全光网技术是当前发展较快的几项光纤通信技术,其中波分复用技术是在一根光纤上同时利用多个波长进行传输,发展前景很好.光纤用户接入网的发展将加速光纤到户的实现.全光网目前存在一些需要解决的技术问题,美国、日本和欧洲一些国家已建立全光网试验网.目前使用最多的G652单模光纤的缺陷限制了其进一步发展,G653色散位移光纤由于四波混频效应不适于在波分复用系统上的应用.C655非零色散位移单模光纤有较好的发展前景.用户光缆具有芯数多,采用带状结构和塑料光纤等特点.

WDM (Wavelength Division Multiplexing), OAN (Optical Access Network) and AON (All Optical Network) are optical communication technologies that develop rapidly nowadays. WDM technology uses multiple wavelengths to transmit over the same optical fiber, showing good development prospects. Optical subscriber access network will speed up the realization of fiber to the home. As to AON, there are some technical problems to be solved. AON trial networks have been set up in America, Japan and some countries in Europe. Finally, the development trends of optical cable are introduced in terms of optical cable types and the characteristics of optical cables used in access networks.