Accession Number:

ADA148293

Title:

Nonlinear Real-Time Optical Signal Processing.

Descriptive Note:

Final technical rept. 15 Apr 81-30 Jun 84,

Corporate Author:

UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES IMAGE PROCESSING INST

Report Date:

1984-10-01

Pagination or Media Count:

90.0

Abstract:

This report summarizes the results of a research program in nonlinear real-time optical signal processing. The program began April 15, 1981 and ended June 30, 1984. The research effort has centered on optical sequential logic systems and their use in digital optical computers, and on variable grating mode VGM liquid crystal spatial light modulators. As part of this study, parallel and twisted nematic liquid crystal light valve LCLV devices have been used as a nonlinear element in a feedback arrangement to implement a binary sequential logic system. A computer generated hologram fabricated on an e-beam system serves as a beamsteering interconnection element. A completely optical oscillator and frequency divider have been experimentally demonstrated, and various circuit interconnection techniques have been explored. Variable-grating mode VGM liquid crystal devices that perform local spatial frequency modulation as a function of the incident intensity have also been investigated. These devices can be used for nonlinear processing by selection and recombination of these spatial frequency components. These devices have many interesting physical effects with useful applications in both analog and numerical optical signal processing.

Subject Categories:

  • Computer Hardware
  • Holography
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE