Multi-wavelength passive optical network system

Abstract

The invention provides a multi-wavelength passive optical network system which comprises an optical line terminal, an optical distribution network and a plurality of optical network units. A primary optical splitter comprises an uplink public port, a downlink public port, a plurality of uplink branch ports and a plurality of downlink branch ports, wherein the uplink public port and the downlink public port are respectively connected to the optical line terminal through an uplink main optical fiber and a downlink main optical fiber, the downlink branch ports and the uplink branch ports are respectively connected with the uplink main optical fiber and the downlink main optical fiber, and the downlink branch ports and the uplink branch ports are connected to a group of optical network units through a secondary optical splitter. Each wave distribution assembly comprises a three-port optical circulator and a fiber bragg grating. The fiber bragg gratings of different wave distribution assemblies have different reflection spectrums. A frame header of a downlink XGTC frame sent by the optical line terminal to an optical network comprises a wavelength indicating domain which is used for bearing wavelength indicating information.

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' demands for bandwidth continue to grow, traditional copper wire broadband access systems are increasingly facing bandwidth bottlenecks. At the same time, optical fiber communication technologies with huge bandwidth capacity are becoming more mature and application costs are decreasing year by year. Optical access technologies, such as passive optical networks, have gradually become strong competitors for next-generation broadband access networks. [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 Line Terminal, O...

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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