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Method and system for waveguide delay based equalization with summing at single-ended to differential converters in optical communication

  • US 10,439,734 B2
  • Filed: 06/28/2017
  • Issued: 10/08/2019
  • Est. Priority Date: 07/01/2016
  • Status: Active Grant
First Claim
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1. A method for communication, the method comprising:

  • in an optoelectronic receiver comprising a directional coupler, first and second photodetectors, first and second transimpedance amplifiers (TIAs), and a gain stage;

    receiving an input optical signal;

    splitting the input optical signal into first and second optical signals using the directional coupler;

    delaying the first optical signal received from the directional coupler using an optical delay at an output of the directional coupler;

    generating a first electrical current from the first optical signal using the first photodetector;

    generating a first voltage from the first electrical current using the first TIA;

    communicating the first voltage to a first input of the gain stage;

    generating a second electrical current from the second optical signal using the second photodetector;

    generating a second voltage from the first electrical signal using the second TIA;

    communicating the second voltage to a second input of the gain stage; and

    generating a differential output voltage from the first and second voltages using the gain stage.

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