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We used intensity-dependent prism coupling of poly[2-methoxy-5-(2Ј-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) waveguides to measure the nonlinear absorption coefficients and nonlinear refractive indices of these waveguides in the range 700-1200 nm. The material's strong nonlinearity combined with low linear waveguide losses (Ͻ1 dB/cm) led to promising figures of merit and have made it attractive for use in all-optical switching applications at wavelengths of Ͼ1150 nm.

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