Nonlinear Real-Time Optical Signal Processing.
Abstract
The results of a one year research program in nonlinear real-time optical signal processing are described. The goal of the program is to extend fast parallel nonlinear operatoons to optical processing systems with large time-bandwidth and space-bandwidth products. The research has concentrated on optical mode (vgm) liquid crystal real-time spatial light modulators. Parallel and twisted nemtic liquid crystal light value (lclv) devices have been used as a nonlinear element in a feedback arrangement in the sequential logic systems. A computer genreated hologram fabricated on an e-beam system serves as a beam steering interconnection element. A completely optical oscillator and frequency divider have been exprimentally demonstrated. Research has continued on variable-grating mode (VGM) liquid crystal devices that perform local spatial frequency modulation as a sunction of the incident intensity. 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. Preliminary theoretical modeling work to expalin these effects is given, and an improved implementation of the intensity level slice function with VGM devices has been demonstrated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1982
- Accession Number
- ADA129291
Entities
People
- A. A. Sawchuk
- A. R. Tanguay Jr
- T. C. Strand
Organizations
- University of Southern California