Optical power automatic equalization method and system for c+l band

Abstract

The invention discloses an optical power automatic equalization method and system in the C+L band, and relates to the field of optical power setting. The steps of the method include: collecting the actual output optical power of each channel, and sequentially calculating the difference between the actual output optical power of each channel and the preset expected output optical power according to the order of wavelength from small to large, if the difference is greater than the preset threshold value, the actual output optical power of the channel is changed by adjusting the input optical power of the corresponding channel until the difference between the actual output optical power and the expected output optical power of all channels is within the threshold below the limit. The invention can realize the optical power balance of each wavelength in the C+L band by automatically adjusting the optical power, thereby ensuring the transmission performance of the system.

Description

Optical power automatic equalization method and system in C+L band technical field The present invention relates to optical power setting field, be specifically related to a kind of optical power automatic equalization method and system of C+L band system. Background technique Existing DWDM (Dense Wavelength Division Multiplexing, dense optical wave multiplexing) system base This paper uses C-band 96 waves (calculated at 50GHz), when the DWDM system is extended to C+L-band 192 waves (calculated at 50GHz), Since the C-band optical signal has a shorter wavelength and the L-band optical signal has a longer wavelength, when all the C-band and L-band optical signals are in one optical signal When mixed transmission in the fiber, there will be a strong Raman effect, that is, the optical power of the short-wavelength (C-band) optical signal, to the long-wavelength (L-band) Optical power transfer of optical signals, that is, the energy loss of short-wavelength signals in t...

AI Technical Summary

Problems solved by technology

But when adjusting the optical power of a certain channel, the optical power of other wavelengths greater than this channel will be affected, for example: the change of the optical power of the first wavelength will affect the second to 192nd wavelengths, but the influence coefficient is different; By analogy, the change of the optical power of the second wavelength affects the next 3~192 wavelengths, but the influence coefficient is different, especially for the optical channel with a wavelength greater than 70~100nm

If the problem cannot be solved, the OSNR of some channels is poor, which will affect the maximum transmission performance of the entire system

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