Accession Number:

ADA142619

Title:

Nonlinear Real-Time Optical Signal Processing.

Descriptive Note:

Annual technical rept. 15 Apr 82-14 Apr 83,

Corporate Author:

UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES IMAGE PROCESSING INST

Personal Author(s):

• Sawchuk,A. A.
• Strand,T. C.
• Tanguay,A. R. , Jr

Report Date:

1983-12-01

Pagination or Media Count:

133.0

Abstract:

The results of the second year of a two year research program in nonlinear real-time optical signal processing are described. The research has concentrated on optical sequential logic systems for parallel digital processing and on variable grating mode VGM liquid crystal real-time spatial light modulators. The goal of the program is to extend fast parallel nonlinear operations to optical processing systems with large time-bandwidth and space-bandwidth products. Parallel and twisted nematic liquid crystal light valve LCLV devices have been used as a nonlinear element in a feedback arrangement in the 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. Research has continued on variable-grating mode VGM liquid crystal devices that perform local spatial frequency modulation as a function of the incident intensity.

Descriptors:

• *SIGNAL PROCESSING
• *DATA PROCESSING
• *NONLINEAR SYSTEMS
• *OPTICAL PROCESSING
• *INFORMATION PROCESSING
• INPUT
• COMPUTATIONS
• REAL TIME
• COMPUTER LOGIC
• PARALLEL PROCESSING
• OPTICAL DATA
• FEEDBACK
• LIQUID CRYSTAL DISPLAY SYSTEMS
• RESEARCH MANAGEMENT
• ANALOG SYSTEMS

Subject Categories:

• Printing and Graphic Arts
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE