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Implementation of an optical multiwavelength full adder with a polarization encoding scheme

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Abstract

We propose and demonstrate an optical multiwavelength full adder that uses polarization encoding and four-wave mixing in photorefractive crystals. Optical wavelengths are employed to encode the different bits of binary numbers. By exploiting the spectral parallelism of optics, we can perform multibit operations simultaneously in photorefractive crystals. The polarization encoding scheme permits an easy, accurate implementation of multiwavelength SUM operations. A carry–save full adder also is demonstrated to improve system speed further during multinumber addition and subtraction.

© 1995 Optical Society of America

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