Abstract
The implementation of an all-optical exclusive- OR (XOR) gate is receiving a lot of attention1-4 due to its great potential as an optical comparator and decision circuit. One of the more promising devices for realizing XOR is the integrated SOA- based interferometric wavelength converter (IWC), offering compactness and stability, as well as high speed (20 + Gb/s).2 A vital issue for practical implementation of optical XOR gates is the tolerance of the gate towards imperfect synchronism of the two signals participating in the XOR operation, as well as the tolerance towards variations of the signal pulse widths. These issues are investigated numerically for a Mach-Zehnder interferometer (MZI) based XOR gate.
© 2002 Optical Society of America
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