Optical cable monitoring device of tree optical cable network

Abstract

The invention discloses an optical cable monitoring device of a tree optical cable network, which is characterized in that the device comprises a multi-wavelength OTDR module, a coarse wavelength division multiplexer, and a 1*N optical switch module; the multi-wavelength OTDR module is used for monitoring the attenuation characteristic change of an optical fiber core in an optical cable; the coarse wavelength division multiplexer is used for separating optical signals of different wavelengths; the 1*N optical switch module is used for performing physical switching or logic operation on optical signals in an optical transmission line; and the multi-wavelength OTDR module, the coarse wavelength division multiplexer and the 1*N optical switch module are connected in sequence. With the device, fault monitoring of the whole tree optical cable network can be realized by monitoring one optical fiber in the tree optical cable network only. The device has the advantages of low cost, high operability, and flexible use.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to an optical cable monitoring device for a tree-shaped optical cable network. Background technique [0002] With the development of optical communication, the scale of optical cable network has expanded rapidly, and the online monitoring system of optical cable plays an important role in the work of maintaining the optical cable network efficiently and quickly. The optical cable monitoring system uses OTDR technology to detect the fault of the monitored optical cable by monitoring the attenuation characteristic change of the optical fiber core in the optical cable, and perform fault location. [0003] The current optical cable monitoring equipment used in the optical cable network consists of an OTDR module and a 1×N optical switch module. The working wavelength of the OTDR module is 1310nm, 1550nm or 1625nm; the N value of the 1×N optical switch module ranges ...

AI Technical Summary

Problems solved by technology

The optical cable monitoring equipment of this working mode is suitable for star optical cable network, but it is inconvenient for tree optical cable network and needs to occupy more optical fibers.

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