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Method for phase-based photonic computing

  • US 10,656,336 B1
  • Filed: 11/01/2019
  • Issued: 05/19/2020
  • Est. Priority Date: 11/08/2018
  • Status: Active Grant
First Claim
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1. A method for optical computation comprising:

  • throughout a time period, controlling a filter bank based on a plurality of weights, comprising;

    based on a first weight of the plurality, determining a first control signal;

    based on a second weight of the plurality, determining a second control signal, wherein the second weight is different from the first weight;

    providing the first control signal to a first optical filter of the filter bank, wherein the first optical filter is associated with a first optical characteristic; and

    providing the second control signal to a second optical filter of the filter bank, wherein the second optical filter is associated with a second optical characteristic different from the first optical characteristic;

    during the time period, receiving a first optical input signal at a first waveguide of the filter bank, wherein the first optical input signal comprises;

    a first portion having the first optical characteristic; and

    a second portion having the second optical characteristic;

    during the time period, substantially concurrent with receiving the first optical input signal, receiving a second optical input signal at a second waveguide of the filter bank, wherein the second optical input signal comprises;

    a third portion having the first optical characteristic; and

    a fourth portion having the second optical characteristic; and

    during the time period, in response to receiving the first and second optical input signals;

    at the first optical filter, based on the first control signal, phase shifting the first portion by a first phase shift amount;

    at the second optical filter, based on the second control signal, phase shifting the second portion by a second phase shift amount, different from the first phase shift amount;

    after phase shifting the first and second portions, generating an optical output signal, comprising coupling the first optical input signal and the second optical input signal; and

    outputting the optical output signal.

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