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IEEE Journal of Quantum Electronics

Logic operations using a bistable etalon with two control beams

Ralph S. Jameson, Dror Sarid

Published Sep 1, 1985• 3 citations
Publisher

Abstract

The theory and demonstration of a novel scheme for performing two-input binary logic operations with a bistable etalon are reported. The scheme employs two edge-injected CO laser beams to control the reflectivity of an InSb etalon. The control beams serve as the inputs to the logic device, while the output is provided by the reflected beam. The application of such a device to two-dimensional array processing is discussed.

DOI
10.1109/jqe.1985.1072825

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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Mar 4, 1986•0 citations
The theory and demonstration of a novel scheme for performing two-input binary logic operations with a bistable etalon are reported. The scheme employs two edge-injected CO laser beams to control the reflectivity of an InSb etalon. The control beams serve as the inputs to the logic device, while the output is provided by the reflected beam. The application of such a device to two-dimensional array processing is discussed.
Abstract InSb etalons operated at 77 K and illuminated by CO lasers (5.5 pm) exhibit continuous wave (c.w.) optical bistability. A wide range of experiments have been performed to further the basic characterization of these devices and to demonstrate their various potential applications. The latter include signal amplification, modulation and, with external switching, the construction of logic gates. Two devices on a single etalon have now been coupled to form a simple all-optical circuit. New results have also been obtained with InSb at room temperature with pulsed CO2 lasers (10.6 pm).
This article describes the application of one type of optical bistable device based on gallium arsenide as the nonlinear medium. The authors discuss several possible operations with GaAs nonlinear Fabry-Perot etalons. This article utilizes a recently developed computer model to illustrate the basic operating principles and applications. The authors mainly concentrate on the device operation itself. In keeping with common practice they use the term optical bistable device when referring to a device that can exhibit optical bistability even when not being used in such a manner. Instead of the expression nonlinear Fabry-Perot etalon, they often use nonlinear etalons or etalon devices.
InSb has been recognized in recent years as a very good material for nonlinear optical devices because of the extremely high nonlinear index of refraction near its band edge. It has proven valuable in investigating bistable optical etalon performance, and nonlinear processes in semiconductors. Numerous schemes for using bistable etalons as basic elements for optical logic and optical computing have been recently developed. Some considerations for using InSb as a material for developing optical bistable devices, and some design considerations for a method of applying bistable optical elements to array processing for do all optical computer are discussed.