Optical Ofdm For Passive Optical Network

1355 Words6 Pages
1. Introduction
2. Optical OFDM for Passive optical networks

The high-speed broadband penetration and ongoing growth of the Internet traffic among customers have been the key reasons that are driving the rapid emergence and deployment of optical access networks as a basic bearer network that supports hybrids services for multiple customers while bearing huge capacity. Passive optical network is the most interesting solution for the optical access network to cope with the increasing bandwidth demand and to meet the cost effectiveness. PON can be used for Point to point (P2P) or Point to multi-point (P2MP) configurations. The P2P structure builds a dedicated fiber from a CO to each subscriber which constitutes an ultimate solution to provide much-needed bandwidth to each ONU. In P2MP topologies, the feeder fiber is shared between various customers and terminates at a central office in an Optical Line Terminal. Passive splitters put between the OLT and the ONU are used to split the connection to multiple end points, thus enormously reduces the maintaining cost. Two key technologies are used in passive optical network: the first one known as TDM-PON uses Time Division Multiplexing to multiplex traffic from/to multiple ONUs onto the upstream/downstream wavelength. It requires complex scheduling algorithms and framing technology to support a variety of services. The second is Wavelength division multiplexing passive optical network “WDM PON”. This technology comes to extend the

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