Journal
OPTICS EXPRESS
Volume 14, Issue 25, Pages 12327-12333Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.14.012327
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Nonlinear loss is the central problem in silicon devices that operate using nonlinear optical effects. Wavelength converters are one example of such devices, wherein high optical intensities required for nonlinear interactions cause two-photon absorption and severe free-carrier absorption. In this paper, we report the first demonstration of nonlinear photovoltaic effect in silicon wavelength converters. This useful phenomenon allows us to eliminate the nonlinear loss caused by free-carrier absorption, while harvesting the optical power that is normally consumed by two-photon absorption. (c) 2006 Optical Society of America.
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