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由于多媒体通信的发展，全光网络成为具有美好发展前景的技术。而接入网的光纤化成为必然的趋势。无源光网络（ＰＯＮ）以其经济有效的成网特点尤其引人注目。本文首先介绍了无源光网络系统的发展情况，然后讨论了有关发展无源光网络的最新技术问题。
Due to the development of multimedia communication, all-optical network has become a promising technology. The fiber optic access network has become an inevitable trend. Passive optical networks (PONs) are particularly attractive for their cost-effective networking features. This paper first introduces the development of passive optical network systems, and then discusses the latest technical issues related to the development of passive optical networks.