A device and method for realizing section protection in single fiber bidirectional WDM system

Abstract

The invention relates to a device for realizing the multiplex section protection of a single fiber bi-directional WDM system, which comprises a management control unit composed of a monitor and a controller, wherein the monitor is located at the receiving end of A-directional wavelength in a channel layer. The method that uses the device to realize the multiplex section protection includes that the monitor detects the signal quality of multiple wavelengths and submits the results to a controller; the controller analyzes the data submitted by the monitor and sends down the protection switch command to a selector. The device and the method can overcome the technical problem that when the fiber in the working channel breaks, the monitor at the optical switch can still detect the reflection of the back light (a light splitter in the direction of the optical switch) so that the optical switch can not be successfully switched; the invention realizes the multiplex section protection switch of the single fiber bi-directional WDM system and ensures the reliable transmission of the WDM system.

Description

Technical field: [0001] The present invention relates to single-fiber bidirectional WDM (Wavelength Division Multiplexing, wavelength division multiplexing technology) system transmission equipment and method in the field of optical communication, in particular to a single-fiber bidirectional WDM system to realize multiplexing section protection device and method, which is beneficial to realize single Reliable transmission of fiber bidirectional WDM system. Background technique: [0002] At present, the WDM system mainly has two structures and methods of dual-fiber bidirectional transmission and single-fiber bidirectional transmission. Among them, the wavelengths of the two directions in the single-fiber bidirectional WDM system are different from each other. When designing the wavelength of the system, you can choose to use red band light in one direction and blue band light in the other direction; you can also choose to use C band wavelength in one direction and use the ot...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a single-fiber bidirectional WDM system to realize multiplexing section protection device and method, mainly to solve the problem that when the optical fiber of the working channel is disconnected when the monitor of the existing device is connected to the branch of the multiplexing section optical switch , the monitor at the optical switch may still detect the reflected light of the reverse light (optical switch to the optical splitter), which leads to the technical problem that the optical switch cannot be switched successfully, ensuring the reliable transmission of the WDM system

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