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Optical dispersion compensation in the electrical domain in an optical communications system

  • US 10,164,707 B2
  • Filed: 11/27/2017
  • Issued: 12/25/2018
  • Est. Priority Date: 10/03/2002
  • Status: Active Grant
First Claim
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1. A method of compensating chromatic dispersion of a communications signal conveyed through an optical communications system, the method comprising:

  • digitally processing a digital input signal using a Fast Fourier Transform (FFT) filter and a compensation function to generate a predistorted signal comprising a pair of orthogonal signal components, in-phase (I) and quadrature (Q), wherein the compensation function mitigates the chromatic dispersion of a plurality of spans, each span having a distance greater than 40 kilometers; and

    modulating in-phase (I) and quadrature (Q) components of an optical signal using the in-phase (I) and quadrature (Q) components of the predistorted signal,wherein a data rate of the communications signal exceeds 2 Gb/s.

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