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Optical receiver with optical transmitter-specific dispersion post-compensation

  • US 9,806,813 B2
  • Filed: 10/01/2014
  • Issued: 10/31/2017
  • Est. Priority Date: 10/01/2014
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a frontend configured to;

    convert an optical intensity-modulated (IM) signal associated with a remote optical transmitter into a plurality of analog electrical signals;

    determine a plurality of direct current (DC) offsets for the analog electrical signals;

    remove the DC offsets from the analog electrical signals to produce a plurality of DC-free analog signals; and

    convert the DC-free analog signals into a plurality of DC-free digital signals; and

    a digital signal processing (DSP) unit coupled to the frontend and configured to;

    perform fiber dispersion compensation on the DC-free digital signals according to a dispersion value associated with the remote optical transmitter to produce a plurality of DC-free compensated digital signals; and

    add the DC offsets to the DC-free compensated digital signals to produce a plurality of DC-restored compensated digital signals.

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