Dispersion engineering of highly nonlinear As(2)S(3) waveguides for parametric gain and wavelength conversion

We numerically demonstrate the use of waveguide dispersion to shift the zero-dispersion wavelength of an As(2)S(3) waveguide to telecom wavelengths. The device implications for parametric gain and wavelength-conversion via four-wave mixing are investigated, giving an operating bandwidth of 550 nm. We also show that the photosensitivity of chalcogenide can be used for post-fabrication tuning of waveguide dispersion characteristics.