几种光传送网技术的比较

随着业务需求特别是宽带业务的增长，人们对高容量系统，特别是光传送网技术进行了大量的研究。目前研究的内容主要涉及到波分复用光网络，光时分复用技术和光码分复用技术。波分复用技术已经在网络中广泛采用，是目前唯一成熟且付诸实用的超大容量光传输系统；光时分复用的研究近几年取得了较大的进展，是未来极具潜力的技术，但远不如波分复用成熟；光码分复用可大大提高光纤的利用率，降低网络成本，简化网络管理，具有较高的网络

Comparison of Optical Transport Network Technologies

As the demands for services, especially broadband services grow, in-depth research has been made into high-capacity systems, particularly optical transport systems. The research items mainly involves WDM, OTDM and OCDMA technologies. The WDM technology, as the only proven super high capacity optical transmission system, has already found wide applications in networks; OTDM is a promising technology with a huge potential, though it is far from mature compared with WDM; OCDMA improves bandwidth utilization, reduces network costs, simplifies network management, and provides higher network security, but some problems have yet to be solved.