All-optical logic in optical waveguides

Abstract
The motivation for the development of all-optical logic elements in integrated optical waveguides is reviewed. The difficulties inherent in the ‘all-optical' approach are outlined. The all-optical, universal logic for pipeline operation based on the Mach— Zehnder interferometer is described and experiments on a prototype all-optical modulator fabricated in LiNbO 3 are presented. The paper concludes with a discussion of a device design for operation with shorter lengths and compatible with semiconductor laser drives.

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