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Optics Letters

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  • Vol. 29, Iss. 5 — Mar. 1, 2004
  • pp: 513–515

Nonreciprocity of counterpropagating signals in a monolithically integrated Sagnac interferometer

Venon M. Menon, Wilson Tong, Fengnian Xia, Chianqiang Li, and Stephen R. Forrest  »View Author Affiliations


Optics Letters, Vol. 29, Issue 5, pp. 513-515 (2004)
http://dx.doi.org/10.1364/OL.29.000513


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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

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.5970) Nonlinear optics : Semiconductor nonlinear optics including MQW
(200.4660) Optics in computing : Optical logic
(250.5300) Optoelectronics : Photonic integrated circuits
(250.5980) Optoelectronics : Semiconductor optical amplifiers

Citation
Venon M. Menon, Wilson Tong, Fengnian Xia, Chianqiang Li, and Stephen R. Forrest, "Nonreciprocity of counterpropagating signals in a monolithically integrated Sagnac interferometer," Opt. Lett. 29, 513-515 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-5-513


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References

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