Abstract

We demonstrate that a twin-core coupler that is composed of nonlinear material with gain behaves like a tapered (linear) coupler and also has a beam-splitting ratio that is optically tunable. This conceptual approach reveals a new class of twin-core all-optical devices that exchange power adiabatically between the cores rather than by the more familiar method of resonance coupling or phase matching.

© 1992 Optical Society of America

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