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Spatial Phase Coding for Incoherent Optical ProcessorsIn this paper we introduce spatial phase coding of incoherent optical signals for representing signed numbers in optical processors and present an experimental demonstration of this coding technique. If a diffraction grating, such as an acousto-optic cell, modulates a stream of light, the image of the grating can be recovered from the diffracted beam. The position of the grating image, or more precisely its phase, can be used to denote the sign of the number represented by the diffracted light. The intensity of the light represents the magnitude of the number. This technique is more economical than current methods in terms of the number of information channels required to represent a number and the amount of post processing required.
Document ID
19970011955
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Tigin, D. V.
(Saint Petersburg State Univ. Saint Petersburg, Russia)
Lavrentev, A. A.
(Saint Petersburg State Univ. Saint Petersburg, Russia)
Gary, C. K.
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 17, 2013
Publication Date
January 1, 1994
Publication Information
Publication: Optics and Laser Technology
Publisher: Butterworth-Heinemann Ltd
Volume: 26
Issue: 4
ISSN: 0030-3992
Subject Category
Computer Operations And Hardware
Report/Patent Number
NASA-TM-111915
NAS 1.15:111915
Accession Number
97N70877
Distribution Limits
Public
Copyright
Public Use Permitted.
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