Proposed Smart Integrated-Optical Preprocessor Using Holographic Subtraction

C. M. Verber; D. W. Vahey

doi:10.1117/12.957282

20 August 1979 Proposed Smart Integrated-Optical Preprocessor Using Holographic Subtraction

C. M. Verber, D. W. Vahey

Proceedings Volume 0178, Smart Sensors; (1979) https://doi.org/10.1117/12.957282
Event: Technical Symposium East, 1979, Washington, D.C., United States

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.

Citation Download Citation

C. M. Verber and D. W. Vahey "Proposed Smart Integrated-Optical Preprocessor Using Holographic Subtraction", Proc. SPIE 0178, Smart Sensors, (20 August 1979); https://doi.org/10.1117/12.957282

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