宽带光纤接入网

Broadband Optical Fiber Access Network

光纤接入网是近十年来发展起来的新技术,负责光传送网宽带接入用户最后1 km的传输。宽带光纤接入网从模拟发展到数字接入网,光纤/同轴混合网络和无源光网络分别为其代表。HFC是上世纪90年代中期发展起来的技术,已得到了广泛应用,而PON是最近几年兴起的新技术,包括ATM无源光网络、以太无源光网络和千兆无源光网络,文中指出了它们的关键技术和系统特点。

Optical fiber access network is developed rapidly in recent ten years and the new technology solves the last 1 km transmission from optical transmission network to customers. The broadband optical fiber access network is developed from analog to digital system, the representative of analog signal optical fiber access network is HFC (hybrid fiber coaxial) network, and the representative of digital signal optical fiber access network is PON(passive optical network). HFC is a developing technology from the middle 90s last century and has been used extensively. PON is a new technology risen in recent years. PONs includes APON (ATM PON), EPON (Ethernet PON) and GPON (Gigabit PON). The key techniques and features of these access networks are analyzed and discussed in detail in this paper.