A method and system for channel power equalization for coherent optical communications

By selecting spectrally sensitive channels in a coherent optical communication system, performing frequency domain energy integration analysis and loss conversion, constructing a hysteresis buffer band, dynamically segmenting the loss exemption interval, and performing constraint fine-tuning compensation, the problem of inaccurate power equalization in existing technologies is solved, and transmission stability and signal quality are improved.

CN122394723APending Publication Date: 2026-07-14GUILIN TRYIN TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUILIN TRYIN TECHNOLOGY CO LTD
Filing Date
2026-03-14
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

In coherent optical communication systems, existing technologies fail to effectively distinguish between power drops caused by filtering effects and line aging, resulting in inaccurate power equalization strategies that affect transmission stability and signal quality, and cannot meet the differentiated transmission needs of channels with different modulation attributes.

Method used

By acquiring the node configuration information of the optical transmission network, spectrally sensitive channels are selected, frequency domain energy integration analysis and loss conversion are performed, a hysteresis buffer band is constructed, the loss exemption interval is dynamically divided, and constraint fine-tuning compensation is performed to adapt to the transmission characteristics of different modulation channels.

Benefits of technology

It achieves precise equalization of channel power, reduces redundancy overhead, improves transmission stability and signal quality, adapts to the transmission characteristics of different modulation channels, and reduces the risk of nonlinear effects.

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Abstract

The application relates to the technical field of optical communication, and particularly discloses a wave channel power equalization method and system for coherent optical communication. The method comprises the following steps: acquiring node configuration information of a target wave channel in an optical transport network, and screening to obtain a spectrum-sensitive wave channel; extracting the effective passband width and the theoretical signal bandwidth of the spectrum-sensitive wave channel, performing frequency domain energy integration analysis to establish an energy cutoff matrix, and calculating a power loss amount; constructing a loss exemption interval based on the power loss amount, performing structured segmentation in combination with the nonlinear tolerance of a modulation attribute, forming a hysteresis buffer band, and executing gain freezing or constraint fine-tuning compensation according to the interval attribution of real-time input optical power. The system corresponds to a wave channel screening module, a loss analysis module, a buffer construction module and a cascade judgment module. The application identifies the power loss source, reduces the nonlinear damage induced by excessive compensation, and is beneficial to improving the power equalization accuracy of the coherent optical communication system.
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