Accession Number:

ADD014839

Title:

Efficient Dynamic Phasefront Modulation System for Free-Space Optical Communications.

Descriptive Note:

Patent, Filed 9 Sep 88, patented 22 Jan 91,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Report Date:

1991-01-22

Pagination or Media Count:

15.0

Abstract:

An optical communications system is disclosed for correcting in real-time the wavefront distortions of a beam from a coherent optical transmitting source. The system includes a collimating lens and beam splitter for receiving a distorted wavefront signal beam and splitting the beam into a pump beam and a weaker intensity signal beam. The system includes a detector and computer for measuring the beam distortion and specifying a compensatory wavefront. The weaker intensity signal beam is modified in a 2-D spatial light modulator according to a compensatory wavefront. A photo-refractive material is used to couple energy from the pump beam to the compensated wavefront signal beam thereby producing a corrected and intensity-enhanced communications beam.

Subject Categories:

  • Optics
  • Command, Control and Communications Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE