TWDM-PON (Time Wavelength Division Multiplexing-Passive Optical Network) system and method based on wavelength-fixed and wavelength-adjustable lasers

Abstract

The invention provides a TWDM-PON (Time Wavelength Division Multiplexing-Passive Optical Network) system based on wavelength-fixed and wavelength-adjustable lasers. The TWDM-PON system based on the wavelength-fixed and wavelength-adjustable lasers comprises a plurality of sub-systems, wherein the sub-systems comprise optical line terminals, wavelength routing modules, waveband demultiplexing-multiplexing modules, light amplifiers, feeder line optical fibers and sub-passive optical networks. At the optical line terminal, through combination of a fixed transceiver module and an adjustable transceiver module, the most basic communication demand of a network is ensured at a fixed wavelength, and resources are allocated flexibly in the network through the adjustable transceiver module in order to meet the user's flow requirement varying in real time of a user. The invention also provides a TWDM-PON method based on the wavelength-fixed and wavelength-adjustable lasers. Through adoption of the method, flexible resource allocation can be realized, and compatibility with an existing TWDM-PON network can be realized. The method has the advantages of low cost and low energy consumption.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a TWDM-PON system and method based on fixed-wavelength and tunable-wavelength lasers. Background technique [0002] With the development of communication technology and the diversification of people's needs, a large number of new services are emerging, including ultra-high-definition image and video transmission, cloud computing, cloud storage, data centers, etc., which have higher and higher requirements for network bandwidth. At the same time, in modern urban life, people work in the city's CBD during the day and return to residential areas to rest at night, which triggers the "tidal effect" of large-scale migration of communication data traffic. From the point of view of time, within 24 hours a day, at the same place, whether it is a residential area or a commercial area, the flow rate fluctuates with the tidal distribution; from the point of view of location, th...

AI Technical Summary

Problems solved by technology

In this structure, a hybrid structure of Cyclic AWG and Power Splitter is designed to realize wavelength routing, which realizes resource scheduling and load balancing. However, this structure uses Interleaver to direct resources to a certain sub-passive optical network as much as possible. , which makes the system structure complex, all transmitters use adjustable transmitters, which increases the cost of the system and brings unnecessary troubles in the process of network construction, maintenance and upgrading

Images