System and method for detecting sub-optical fibers, ODN (optical distribution network) and optical splitter

Abstract

The embodiment of the invention provides a system for detecting sub-optical fibers, comprising a main optical fiber, a light splitting module and multiple sub-optical fibers, wherein the light splitting module comprises at least one light splitter; each port of the light splitting module is provided with an optical film which is used for carrying out bandpass filtering on optical signals sent to the ports of the light splitter in accordance with a preset rule, and the optical films can cause pass bands of test links corresponding to sub-optical signals to be different; test equipment is used for selecting test wavelength sub-bands which are matched with the optical films of the ports of the light splitter in testing light spectrums in accordance with ports of the light splitter corresponding to to-be-tested sub-optical fibers, sending test signals corresponding to the selected test wavelength sub-bands to the ODN, receiving reflected signals which are formed by reflecting the test signals on the corresponding sub-optical fibers and acquiring the channel characteristics of the to-be-tested sub-optical fibers in accordance with the reflected signals. The embodiment of the invention also provides a method for detecting the sub-optical fibers, an ODN (optical distribution network) and an optical splitter.

Description

technical field [0001] The present invention relates to the technical field of optical network communication, in particular to a branch optical fiber detection system and method, and an optical distribution network and an optical splitter that can be used in the above branch optical fiber detection system. Background technique [0002] A passive optical network (Passive Optical Network, PON) system is a point-to-multipoint optical access network system, which usually includes an optical line terminal (Optical Line Terminal, OLT) at the central office and multiple optical Network unit (Optical Network Unit, ONU). The OLT and the ONU are connected by using an optical distribution network (Optical Distribution Network, ODN), and the ODN usually includes an optical splitter. The optical splitter can be used to realize the distribution of downlink optical signals from the central office to corresponding users through the branch optical fiber, and converge the upstream optical si...

AI Technical Summary

Problems solved by technology

Therefore, the branch fiber detection scheme in the prior art has the problem of low light utilization rate, which easily causes the signal-to-noise ratio of the reflected light detected by the OTDR on the trunk fiber to be too low, which may cause false detection

On the other hand, in the branch fiber detection solution in the prior art, it is necessary to configure different bandpass filters for each branch fiber at the user-side port of the optical splitter, which will lead to high storage and system maintenance costs

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