Multi-wavelength passive optical network system

Abstract

The invention provides a multi-wavelength passive optical network system. The multi-wavelength passive optical network system comprises an optical line terminal, an optical distribution network and a plurality of optical network units, wherein the optical line terminal is connected to the optical network units in the mode that one point is connected to multiple points through the optical distribution network. According to the multi-wavelength passive optical network system, the optical network units are divided into a plurality of groups, each group of the optical network units adopts a specific uplink wavelength and a specific downlink wavelength, the optical distribution network comprises a first-level optical splitter and a plurality of second-level optical splitters, the public port of the first-level optical splitter is connected to the optical line terminal through a main optical fiber, the branch ports of the first-level optical splitter are connected with branch optical fibers respectively and are connected to one group of optical network units through one of the second optical splitters, the branch optical fibers which are connected with the branch ports of the first-level optical splitter are respectively connected with a wavelength reflector in series, the public port of the first-level optical splitter is connected with an optical absorber, and the different wavelength reflectors have different transmission wavelengths and different reflection wavelengths.

Description

technical field [0001] The present invention relates to an optical access technology, in particular to a multi-wavelength passive optical network (Passive Optical Network, PON) system. Background technique [0002] As users' demand for bandwidth continues to grow, traditional copper broadband access systems are increasingly facing bandwidth bottlenecks. At the same time, the optical fiber communication technology with huge bandwidth capacity is becoming more and more mature and the application cost is decreasing year by year. Optical access technology, such as passive optical network, has gradually become a strong competitor for the next generation broadband access network. [0003] Traditional passive optical network systems, such as Gigabit-capable Passive Optical Network (GPON) systems or Ethernet Passive Optical Network (EPON) systems, generally use point-to-multipoint ( Point to multiple point (P2MP) network architecture, that is, the optical line terminal (Optical Lin...

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned traditional point-to-multipoint passive optical network system, since the optical network units share the optical transmission medium in the way of time division multiplexing, under the network architecture with a large branch ratio, the time division characteristics of the time division multiplexing mode seriously affect the optical Network element bandwidth

Therefore, with the development of broadband services, traditional passive optical network systems cannot meet users' increasing demand for bandwidth

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