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Proceedings Paper

Proposed Smart Integrated-Optical Preprocessor Using Holographic Subtraction
Author(s): C. M. Verber; D. W. Vahey
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Paper Abstract

It is possible to form an optical analog of a set of N analog voltages by passing an optical plane wave, confined in an electrooptic waveguide, under a set of N electrodes to which the voltages are applied. In the limit in which diffraction is ignored, the wavefront of the emerging guided wave will have superimposed upon it N discrete phase shifts. We have designed and are in the process of fabricating a number of processors which operate upon analog voltages encoded in this manner. These include a simple comparator in which incoming data are compared to a holographic record of the optical analog of a reference set, a device which is designed to perform an identification function by comparing each set of data to a library of reference sets, and a "smart" system based upon holographic self-subtraction, in which the processor is able to independently adapt to changes in background information. A laboratory model of the first of these preprocessors has been built and tested, the second is under development and experiments designed to define the operating parameters of the self-subtraction preprocessor are in progress. The principles of operation, potential applications and progress towards the implementation of the devices in an integrated optical configuration are described.

Paper Details

Date Published: 20 August 1979
PDF: 6 pages
Proc. SPIE 0178, Smart Sensors, (20 August 1979); doi: 10.1117/12.957282
Show Author Affiliations
C. M. Verber, Battelle Columbus Laboratories (United States)
D. W. Vahey, Battelle Columbus Laboratories (United States)

Published in SPIE Proceedings Vol. 0178:
Smart Sensors
David F. Barbe, Editor(s)

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