Optical distribution network, optical network system, optical splitter and port identification method of optical splitter

Abstract

An optical distribution network, an optical network system, an optical splitter and a port identification method of the optical splitter are used to solve the problem in the prior art that the ports of the optical splitter cannot be compatible with existing optical network terminals. The optical distribution network includes an optical splitter, a first optical filter and a first power change component, the optical splitter includes at least two output ports, each output port corresponds to at least one first optical filter, and different output ports correspond to different first optical filters. Optical filters, different first optical filters allow or block the detection light having different central wavelengths, each output port of each optical splitter of the N-th stage optical splitter corresponds to the first power change component, and the first power change component It is used for changing the power of the first service light according to the received first detection light. In this way, the port of the optical splitter connected to the optical network terminal can be determined according to the first power of the first service light, the second power of the changed first service light, and the corresponding central wavelength of the detection light.

Description

technical field [0001] The present application relates to the technical field of optical communication, in particular to an optical distribution network, an optical network system, an optical splitter and a port identification method of the optical splitter. Background technique [0002] With the development of communication technologies, passive optical network (Passive Optical Network, PON) systems are more and more widely used in optical communication technologies. The PON system mainly includes an optical line terminal (OLT), a plurality of optical network terminals (ONT), and an optical distribution network (ODN) connecting the OLT and the ONT. Among them, OLT is the central office equipment of telecommunications, and its position in the PON network is located at the central office; ONT is the terminal unit of the PON network, also known as "optical modem"; ODN can provide optical signal transmission channels between OLT and ONT, The ODN does not contain any electronic...

AI Technical Summary

Problems solved by technology

[0003] The PON network has the characteristics of wide coverage, large number of branch optical paths, and passive sources. After the ODN network is put into operation, it is impossible to visually determine the topology of the ODN network because which ports of the optical splitter in the ODN network are connected to the ONT. Connection relationship, that is, the PON cannot recognize the output port of the optical splitter connected to the ONT

In the existing technology, in order to determine the topological connection relationship of the ODN network, additional components need to be added to the ONT or the receiving optical path of the ONT needs to be changed, which cannot be compatible with the existing ONT

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