Spectral broadening measurements in poly(phenylene vinylene) polymer channel waveguides

Abstract

In a poly conjugated main chain polymer strip waveguide the nonlinear, nonresonant refractive index n2 was measured by monitoring the signal spectrum broadening due to self-phase modulation. The two photon absorption coefficient α2 was obtained by calibrating the inverse transmission measurement. The nonlinear coefficients were determined to be n2 = 0.85× 10-14 cm-2/W and α2 = 0.08 cm/GW at a wavelength λ=885.6 nm. The used polymer was poly[1,4-phenylene-1,2-di(phenoxyphenyl)vinylene]. The result is in good agreement with interferometer measurements. The material is suitable for all-optical switching. © 1997 American Institute of Physics.