Adaptive Optical Processor
Abstract
The Phase I in-house effort to develop an optical processor as an electronic counter-counter-measure for radar multipath is discussed. The closed loop system demonstrates the ability to achieve a 15.2+/-2.4 dB adaptive cancellation of a single tone, single delay jamming signal over a 1-5 MHz bandwidth. The open loop optical system proves capable of providing a 30.2+/-3.9 dB cancellation of the same signal when using operator provided information. Key elements of this project include the characterization and selection of a spatial light modulator (SLM) system and the development of a software package which assists the minimization process. This has resulted in the novel use of a two dimensional binary SLM to perform as an enhanced grey scale one dimensional SLM. Additionally, an acousto-optic (AO) deflector has been demonstrated to provide the grey level dynamic range and spatial resolution required by the system. The results of this single channel testbed will be used in the future development of a multichannel optical processor.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1991
- Accession Number
- ADA241535
Entities
People
- Christopher W. Keefer
- Michael J. Ward
- Stephen T. Welstead
Organizations
- Rome Laboratory