Patent ID: 7310481
Filing Date: 2007-12-18
Classification: H04J

Abstract:
1. A wavelength division multiplexed-passive optical network (WDM-PON) having a bus structure, comprising: a central office for exchanging downstream/upstream optical signals having different wavelengths through a feeder fiber, the central office having a first wave division multiplexer (WDM) for multiplexing the downstream optical signals and demultiplexing the upstream optical signals; a plurality of remote nodes coupled to the central office in sequence through the feeder fiber, each remote node including an add/drop multiplexer for dropping optical signals having corresponding wavelengths from the central office, and at least one secondary wave division multiplexer (WDM) for splitting the downstream/upstream optical signals to at least one subscriber unit coupled to each of the remote nodes and transferring the upstream optical signals from each subscriber unit to the central office; and at least one subscriber unit including at least one third wave division multiplexer (WDM) for receiving the optical signals having corresponding wavelengths from each of the remote nodes and for transferring the upstream optical signals having different wavelengths through each of the remote nodes.