| 摘要 |
The present invention provides a non-linear compensating method and device, used for solving the problem of large amount of computation in the existing algorithm for computing non-linear impairment compensation of a polarization multiplexing-wavelength division multiplexing system. The present invention comprises: dividing the distance of each channel into S sections of equal length according to the step length value, wherein the step length value is greater than the dispersion length value of a transmitted signal and less than the non-linear length value of the transmitted signal, and S is an integer greater than 1; acquiring the dispersion compensation factor of each channel, the walk-off factor between different channels, and the correlation coefficient between adjacent transmitted signals in each channel; performing dispersion compensation on each of the S sections of each channel according to the dispersion compensation factor; and performing non-linear compensation on each of the S sections of each channel according to the correlation coefficient and the walk-off factor. By means of the present invention, the impact of the dispersion and the walk-off effect is considered when the non-linear impairment compensation is computed, the step length can far exceed the dispersion length, and the computing steps and the total amount of computation can be effectively reduced. |
