Proposed smart integrated-optical preprocessor using holographic subtractionThe paper presents a proposed integrated-optical preprocessor with a holographic subtraction. It is based on an optical analog of a set of N analog voltages formed 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. Processors which operate upon voltages encoded in this manner are being fabricated; they include a comparator in which incoming data are compared to a holographic record of the optical analog of a reference set, and a 'smart' system based upon holographic self-subtraction, in which the processor can independently adapt to changes in background information. The preprocessor operation is described in the screening, identification, and the self-subtraction modes, and implementation of devices in an integrated optical configuration is discussed.
Document ID
19800033234
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Verber, C. M. (Battelle Columbus Labs. OH, United States)
Vahey, D. W. (Battelle Columbus Laboratories Columbus, Ohio, United States)