Novel passive optical network system based on distributed Raman optical amplifier

Abstract

The invention discloses a novel passive optical network system based on a distributed Raman optical amplifier, and relates to the technical field of optical communication, the novel passive optical network system comprises an optical line terminal / passive optical distribution network and an optical network unit, the optical line terminal comprises a first circulator, and an OLT sending end and an OLT receiving end which are connected with the first circulator; the passive optical distribution network comprises a wavelength coupler and an optical beam splitter connected with the wavelength coupler, and the wavelength coupler is connected with the first circulator; the optical network unit comprises a Raman pump light source and a plurality of optical network subunits, and the Raman pump light source is connected with the wavelength coupler; wherein each optical network subunit comprises a second circulator, an ONU sending end and an ONU receiving end, the ONU sending end and the ONU receiving end are connected with the second circulator, and the second circulator in each optical network subunit is connected with the optical beam splitter. The application cost can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a novel passive optical network system based on a distributed Raman optical amplifier. Background technique [0002] The 21st century is a highly informatized era, and the transmission, processing, and storage of information will require unprecedented scale and speed, reaching the order of terabit (1Tb / s). In recent years, with the continuous improvement of the degree of social informatization, especially the explosive growth of data services based on IP (Internet Protocol, the protocol for interconnection between networks), for the basis of information transmission (optical fiber backbone transmission network) , It has become an inevitable trend to increase the single-channel transmission rate from 40Gbit / s to 100Gbit / s or even 1Tbit / s. [0003] With the increasing transmission capacity of medium and long-distance backbone networks, the access network is also unde...

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Problems solved by technology

However, the working wavelength range of the rare earth-doped fiber amplifier depends entirely on the physical properties of the doped rare earth elements, so the working wavelength range is very limited, and it will lead to high nonlinear effects, and the volume and power consumption are large, basically It cannot be used at the ONU side; on the other hand, although the semiconductor laser can provide a large operating wavelength range, and the volume and power consumption are small, but the saturated output gain it provides is small, and the noise figure is large

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