Abstract

We demonstrate nonlinearly induced nonreciprocity of counterpropagating waves in a monolithically integrated Sagnac interferometer that employs a semiconductor optical amplifier as the nonlinear element. We show that the dependence of the linewidth enhancement factor on charge injection can influence the third-order nonlinearity in the semiconductor gain medium to a surprisingly large degree. This effect is utilized to control the phases of the counterpropagating signals in the interferometer. A theoretical model is used to explain the experimental observations. We show that these effects have significant practical implications by demonstrating an all-optical controlled-not gate.

© 2004 Optical Society of America

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Errata

Vinod M. Menon, Wilson Tong, Fengnian Xia, Chianqiang Li, and Stephen R. Forrest, "Nonreciprocity of counterpropagating signals in a monolithically integrated Sagnac interferometer: erratum," Opt. Lett. 29, 1156-1156 (2004)
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-29-10-1156

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