Channel power automatic searching and adjusting method and system based on bit error rate

Abstract

The invention discloses a channel power automatic searching and adjusting method and system based on bit error rate, and relates to the technical field of DWDM. The invention adopts the mode that a receiving end monitors each BER and feeds back the BER to a sending end, and a channel power automatic searching and adjusting algorithm based on bit error rate is adopted to optimize the performance ofthe receiving end, and stable transmission of optical network signals is ensured. When a project is initiated, the method can adapt to adjustment and optimization of power flatness and receiver performance in various optical fiber types and amplifier scenes, the tedious and time-consuming process of manual trial on gradual adjustment of each wavelength is reduced, and system performance indexes and redundancy can be directly reflected due to the fact that BER and Q values of all channels are in one-to-one correspondence. The method can effectively balance and improve the communication qualityof each channel. And after the project is initiated, fine adjustment can be performed, thereby being beneficial to optimizing the system in time and improving the overall anti-decay performance of the system.

Description

technical field [0001] The invention relates to the technical field of DWDM, in particular to a method and system for automatic search and adjustment of channel power based on bit error rate. Background technique [0002] In long-distance high-speed optical communication transmission systems, 96 wavelengths or 128 wavelengths are usually used for signal transmission, and each wavelength will cause damage during transmission, such as fiber nonlinear effect damage, nonlinear effects include Kerr effect ( Divided into self-phase modulation, cross-phase modulation, four-wave mixing) and stimulated scattering (divided into stimulated Raman scattering, stimulated Brillouin scattering), in which the Kerr effect affects optical signals in optical fibers such as G.655 The impact on quality is particularly pronounced. [0003] At present, when link projects of 100G, 200G, 400G and other high-speed optical communication systems are opened and maintained, in order to overcome the influ...

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Problems solved by technology

[0004] However, as the optical communication rate continues to increase, the influence of nonlinear effects on different optical fibers (such as G.655 optical fiber) is significantly increased. The power flatness at the receiving end cannot guarantee the best quality of the optical signal, and even flatness at the receiving end will cause signal quality degradation.

The existing technology focuses on adjusting the optimal flatness of the transceiver end, but ignores the evaluation of the actual optical signal quality, and the frequency of manual adjustment is relatively high, which is not suitable for ultra-high-speed optical signal adjustment in systems with high nonlinear effects. And it cannot be dynamically adjusted based on the nature of optical signal quality to improve system performance

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