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Resonating optical waveguide using multiple diffractive optical elements

  • US 10,412,378 B2
  • Filed: 05/08/2017
  • Issued: 09/10/2019
  • Est. Priority Date: 05/08/2017
  • Status: Active Grant
First Claim
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1. A resonating optical waveguide having a first end, a second end, a first surface, and a second surface, the resonating optical waveguide comprising:

  • a first diffractive optical element positioned between the first end and the second end and configured to;

    allow light to enter through the first surface into the resonating optical waveguide; and

    cause the light to traverse in a first direction from the first diffractive optical element towards the first end;

    a second diffractive optical element positioned between the first diffractive optical element and the second end and configured to;

    receive the light traversing in the first direction from the first diffractive optical element; and

    allow a first portion of the light traversing in the first direction to exit out of the resonating optical waveguide via the second surface; and

    a third diffractive optical element positioned between the second diffractive optical element and the second end and configured to;

    receive a second portion of the light traversing in the first direction from the second diffractive optical element; and

    cause a third portion of the light to traverse in a second direction towards the second end, wherein the second diffractive optical element is further configured to;

    receive the third portion of the light traversing in the second direction from the third diffractive optical element; and

    allow a fourth portion of the light traversing in the second direction to exit out of the resonating optical waveguide via the second surface.

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