Optical Span Power Balancing for C-Band and L-Band SRS Compensation
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Solution Overview
Problem
The performance of wavelength division multiplexing systems deteriorates due to power transfer from C-band signals to L-band signals caused by stimulated Raman scattering (SRS) effects, leading to increased nonlinear damage and poor compensation in existing power regulation methods.
Innovation Solution
A power regulation method that adjusts the power of C-band and L-band signals by determining compensation amounts to minimize the power difference between amplifiers, optimizing the optical signal-to-noise ratio and reducing nonlinear damage, thereby enhancing system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power of the C-band signal is increased to compensate for power transfer caused by SRS effect, then the power loss of C-band signal is compensated, but the nonlinear damage cost of the C-band signal increases
Solution Approach 1:
The patent changes the power parameters of both C-band and L-band signals simultaneously. Specifically, it increases the C-band signal power by a first compensation amount and decreases the L-band signal power by a second compensation amount, based on the measured power difference and SRS effect characteristics. This coordinated parameter adjustment compensates for C-band power loss while controlling nonlinear damage by preventing excessive C-band power increase.
2Loss of energy
If the power of the C-band signal is increased to compensate for power transfer, then the power transfer compensation effect is improved, but the compensation effect is insufficient and cannot thoroughly solve the performance deterioration problem
Solution Approach 1:
The patent implements a feedback mechanism by measuring the actual power difference between C-band and L-band signals, using this measurement to calculate appropriate compensation amounts, adjusting the signal powers accordingly, and iteratively optimizing until the power difference meets threshold requirements. This closed-loop feedback approach ensures thorough compensation and resolves system performance deterioration effectively.
Solution Approach 2:
The patent employs dynamic adjustment of signal powers based on real-time power difference measurements. The compensation amounts are dynamically calculated considering the actual operating conditions, allowing the system to adaptively optimize performance rather than using fixed compensation values, thereby achieving thorough resolution of performance deterioration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively compensates for power transfer due to SRS effects, improving the optical signal-to-noise ratio and reducing nonlinear damage, thus optimizing the performance of wavelength division multiplexing systems.
Implementation Method 1
the performance of the wavelength division multiplexing system deteriorates due to transfer of power from a C-band signal to an L-band signal caused by a stimulated Raman scattering (SRS) effect
Data Source
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AI summary
The present application relates to the technical field of communications, and discloses a power regulation method and an optical communication system. The power regulation method comprises: obtaining a power difference between first power of a first amplifier in a target transmission span and second power of a second amplifier in the target transmission span, wherein the first amplifier is used for transmitting a first waveband signal, the second amplifier is used for transmitting a second waveband signal, and the first power is smaller than the second power; when the power difference is greater than or equal to a threshold value, determining a first compensation amount of the first power and a second compensation amount of the second power on the basis of the power difference, the sum of the first compensation amount and the second compensation amount being smaller than the power difference; and increasing the first power of the first amplifier to first correction power according to the first compensation amount, and decreasing the second power of the second amplifier to second correction power according to the second compensation amount, so that a power difference between the first correction power and the second correction power is smaller than the threshold value.