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Solid state LIDAR circuit with waveguides tunable to separate phase offsets

  • US 9,575,341 B2
  • Filed: 06/28/2014
  • Issued: 02/21/2017
  • Est. Priority Date: 06/28/2014
  • Status: Active Grant
First Claim
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1. A circuit device comprising:

  • an array of waveguides in a substrate coupled to a splitter that splits source light into the array of waveguides;

    an insulating layer on the substrate, the insulating layer having an opening to expose a portion of a path of the array of waveguides;

    a liquid crystal layer on the insulating layer and on the portion of the path of the array of waveguides exposed by the opening in the insulating layer, wherein a voltage across the liquid crystal layer is to cause a greater phase shift in a given waveguide relative to another waveguide in the array of waveguides exposed by the opening in the insulating layer; and

    a coupler integrated in the substrate to receive light from the array of waveguides and couple the light through the liquid crystal layer.

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