| 摘要 |
<p>A dispersion and nonlinearity compensation method and system in a coherent optical communication system. The method comprises: dividing the total length of an optical fiber into N steps having equal lengths, and performing dispersion compensation and then nonlinearity compensation in each step. The performing nonlinearity compensation in each step comprises: with a current sampling point as a center, performing sampling at 2k+1 sampling points of X and Y polarization states respectively, calculating power of 2(2k+1) sampling points, adding power of sampling points at the same position on X and Y polarization states to obtain 2k+1 power values, performing weighted summation on the 2k+1 power values, then multiplying the weighted sum by a preset coefficient W to obtain a nonlinear phase angle of the current sampling point, and performing compensation according to the nonlinear phase angle, N and k being positive integers. In the technical solution according to the embodiment of the present invention, the manner for calculating the nonlinear phase angle is improved, and the calculation is less complex.</p> |
