Raman Suppression System for Optical Access Network Based on Microwave Photon Filtering

Abstract

The invention discloses a Raman suppression system of an optical access network based on microwave photon filtering. The invention includes an optical line terminal, a feeder type optical fiber, an optical remote node, a plurality of distributed optical fibers, and a plurality of optical network units; the optical line terminal is connected to the optical remote node through a feeder type optical fiber, and the optical remote node is connected to Connect the ONU. The present invention uses cascaded semiconductor optical amplifiers to amplify the power of the downlink signal on the one hand, and utilizes its high-pass property in the deep saturation region, that is, microwave photon filtering, to realize the preprocessing of the low-frequency components of the signal and reduce the optical access of the next generation. The effect of Raman scattering noise of the network system on the existing optical transmission system. The system does not require an external high-speed electrical processing module, and realizes multiple uses of a single device, reducing system cost to a certain extent.

Description

Technical field [0001] The present invention relates to the technical field of communication of optical access networks, in particular to a Raman suppression system of optical access networks based on microwave photon filtering. Background technique [0002] With the continuous improvement of the degree of social informatization, new services such as IPTV, high-definition video, mobile multimedia, and wireless data backhaul and fronthaul continue to emerge, and end users are increasingly demanding access bandwidth. As the "last mile" user access network (wired / wireless), the development is relatively slow, which directly affects the business capacity, quality, speed and the development and utilization of network resources that the communication network can provide, and has become a constraint on the development of the entire network. Bottleneck. At the same time, radio access network (RAN, Radio access network) is an important asset for mobile operators to survive. With the rise...

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Problems solved by technology

[0007] The purpose of the patent of the present invention is to provide an all-optical Raman suppression system for optical access networks based on microwave photon filtering to solve the problem of the Raman scattering noise suppression scheme in the existing access network system

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