Design of microstructured optical fibres made from highly nonlinear glasses for FWM-based telecom applications

A fully-vectorial mode solver based on the finite element method is employed in a combination with the simplex method for the dispersion optimization of microstructured optical fibres made from highly nonlinear glasses. The nonlinear fibres are designed for FWM-based telecom applications such as parametric broadband amplification, wavelength conversion, ultra-fast switching and regeneration of optical signals. The optimization is carried out in terms of the zero dispersion wavelength, dispersion magnitude and slope, nonlinear coefficient and confinement loss in the wavelength range around 1550 nm and for the microstructured fibres made from lead oxide, bismuth oxide, tellurium oxide and chalcogenide glasses. We restrict our work to the index-guiding fibre structures with three, four and five rings of air holes. For most telecom applications a zero dispersion wavelength around 1550 nm is desirable, with a dispersion magnitude and slope as small as possible.

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