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2009
Journal Article
Titel
Competing nonlinearities in quadratic nonlinear waveguide arrays
Abstract
We demonstrate experimentally the existence of competing focusing and defocusing nonlinearities in a double-resonant system with quadratic nonlinear response. We use an array of periodically poled coupled optical waveguides and observe inhibition of the nonlinear beam self-action independent on power. This inhibition is demonstrated in both regimes of normal and anomalous beam diffraction. (C) 2009 Optical Society of America