Self-phase-modulation in submicron silicon-on-insulator photonic wires

摘要: We measure the transmission of ps-pulses through silicon-on-insulator submicron waveguides for excitation wavelengths between 1400 and 1650 nm peak powers covering four orders magnitude. Self-phase-modulation induced spectral broadening is found to be significant at coupled even a few tens mW. The nonlinear-index coefficient, extracted from experimental data, estimated as n(2) ~ 5*10(-18) m(2)/W 1500 nm. results show good agreement with model calculations that take into account nonlinear phase shift, first- second order dispersion, mode confinement, frequency dispersion n(2), dynamics two-photon-absorption-generated free carriers. Comparison theory indicates an observed twofold increase can assigned well first order- rather than second-order effects. analysis pulse broadening, shift saturation allows estimating power threshold nonlinearity-induced signal impairment in nanophotonic devices.