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We observed optical nonlinear-effects of silicon waveguides while suppressing the influence of free-carrier for 40 Gb/s. The effect of free-carrier generated by two-photon absorption in silicon waveguides was relatively small with 40 GHz pump pulses.
Ultrafast all-optical cross-phase modulation in InGaAs/AlAsSb quantum wells, where interband dispersion is modulated by intersubband excitation, is applied to a MZI switch, demonstrating all-optical signal processing such as demultiplexing and wavelength conversion of 160-Gb/s OTDM signal.
We propose all-optical switching devices based on the cross-phase modulation in silicon waveguides for high-bit-rate signals over 40 Gb/s while suppressing the influence of free carriers.
We demonstrated all-optical wavelength conversion at 80 Gb/s using a cross-phase modulation of InGaAs/AlGaAs/AlAsSb coupled double quantum wells waveguide and a subsequent spectral filtering. Error free operation was demonstrated with power penalty of 1.5 dB.
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