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Transceiver for a wireless optical telecommunication system

  • US 6,678,079 B1
  • Filed: 03/09/2001
  • Issued: 01/13/2004
  • Est. Priority Date: 07/28/2000
  • Status: Expired due to Term
First Claim
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1. A system, comprising:

  • a holographic optical element (HOE) device having;

    a first element having first and second surfaces, the first surface being positionable to face incident light rays, an emulsion material disposed over the second surface of the first element and having a recorded interference pattern thereon, and a second element having a first surface disposed over the emulsion material, the second element being structured to pass resulting light rays, derived from the incident light rays diffracted by the recorded interference pattern, in a direction towards a location facing a second surface of the second element;

    an optical processing unit to receive the resulting light rays passed by the second element; and

    a transmitter unit disposed at least in part behind the second surface of the second element, the transmitter unit comprising an optical fiber capable to provide a light signal, a first and a second optical element to expand the light signal provided by the optical fiber, a third optical element to control divergence of the expanded light signal, and a fourth optical element to collimate light that exits from the transmitter unit.

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