edfa device with osc amplification for optical line protection system

Abstract

The invention provides an OSC amplification EDFA device for an optical line protection system. The OSC amplification EDFA device comprises an optical amplification module, a wave dividing unit used for dividing an input signal into an OSC signal and a service signal subjected to signal amplification by the optical amplification module, a light dividing device used for dividing the separated OSC signal into two paths, an optical power detection unit used for being connected with the OSC signal output by the first path of the light dividing device and used for detecting whether the wavelength of the OSC signal is 1490 nm or 1510 nm, a first optical relay used for relaying the OSC signal with the wavelength being 1490 nm, a second optical relay used for relaying the OSC signal with the wavelength being 1510 nm, a control unit used for selecting the first optical relay or the second optical relay according to a detection result of the optical power detection unit to carry out photoelectric relaying on the OSC signal output by the other path of the light dividing device, and a wave mixing unit used for carrying out optical coupling on the service signal subjected to signal amplification and the OSC signal subjected to photoelectric relaying and then outputting the coupled signal. By means of the OSC amplification EDFA device for the optical line protection system, the OSC signal which cannot be amplified by the EDFA can be automatically worked out, and subjected to signal relaying and then wave mixing and outputting and then continue to be transmitted.

Description

technical field [0001] The invention relates to the technical field of optical line protection, in particular to an EDFA device with OSC amplification used in an optical line protection system. Background technique [0002] With the gradual application of DWDM systems, the OLP (Optical Line Automatic Switching Protection) system has become an important tool for maintaining the security of WDM systems. However, there are still some hidden dangers in the OLP system, especially in multiple cascaded OLP systems, how to prevent downstream false switching caused by upstream switching needs to introduce a new protection judgment mechanism. The most commonly used improvement method is to monitor the integrated service optical power and OSC optical power. When both are lower than the threshold value at the same time, it is judged that the line is faulty. Since the optical power of the OSC signal does not change with the service light, the reliability of the line switching judgment i...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent application CN104134924A proposes an EDFA structure, including an amplifying optical path and a pumping light source, which is an upgrade of the traditional EDFA structure and does not consider OSC signal processing

This invention only considers the OSC signal of a single wavelength, and does not process the OSC signal of two different wavelengths

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