Efficient computation and compensation of linear and nonlinear distortion in dispersion-managed fiber-opic transmission

摘要

In one embodiment, a method for performing nonlinearity compensation on a dispersion-managed optical signal that was transmitted over an optical communication link, the method including virtually dividing the communication link into a plurality of steps, performing lumped dispersion compensation on a received optical signal to obtain a waveform upon which digital backward propagation (DBP) can be performed, performing DBP by performing dispersion compensation and nonlinearity compensation for each step, and generating an estimate of the transmitted signal based upon the performed DBP.

主权项

1. A method for performing nonlinearity compensation on an optical signal that was transmitted over a dispersion-managed optical communication link, the method comprising:
a processor virtually dividing the communication link into one or more segments, each segment comprising a plurality of spans, and virtually dividing each span into a plurality of distance steps, each distance step representing a fraction of the length of its span; for each segment of the communication link: performing lumped dispersion compensation on a received optical signal for a first group of spans of the segment to obtain a waveform upon which digital backward propagation (DBP) can be performed, performing DBP for a further span of the segment and performing lumped dispersion compensation for the remaining spans of the segment; and generating an estimate of the transmitted signal based upon the performed DBP.