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High speed free-space optical communications

  • US 10,615,871 B2
  • Filed: 11/19/2015
  • Issued: 04/07/2020
  • Est. Priority Date: 02/17/2009
  • Status: Active Grant
First Claim
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1. A multi-channel optical communications device for free-space optical communications capable of non-mechanical beam directivity, the device comprising at least two symmetric, oppositely facing transceiver systems, each comprising:

  • a transmitting lens;

    an optical diffuser positioned behind the lens at a distance equal to a focal length of the lens;

    a plurality of laser emitter clusters positioned behind the optical diffuser, each of the plurality of laser emitter clusters configured to emit a laser beam bundle, each laser emitter cluster positioned relative to the transmitting lens so the emitted laser beam bundle travels a distinct optical path through the optical diffuser and the transmitting lens, wherein the optical path is separated and angularly-shifted from optical paths of other laser beam bundles; and

    circuitry configured to activate one of the plurality of laser emitter clusters based on a desired optical path for the laser beam.

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