Abstract

We investigate supercontinuum generation (SCG) in ${\mathrm{AsSe}}_2\text{-}{\mathrm{As}}_2{\mathrm{S}}_5$ chalcogenide microstructured optical fibers (MOFs) pumped by different optical modes. The influence on SCG by different optical modes including the fundamental and high-order modes is analyzed numerically. The evolution of the supercontinuum (SC) is investigated by changing the pump wavelength (2120, 2580, and 3280 nm) and peak power (from 200 to 1000 W) of each optical mode $({\mathrm{LP}}_{01},{\mathrm{LP}}_{11},{\mathrm{LP}}_{31})$ in the MOFs with different fiber lengths. SCG in MOFs with different core diameters is also simulated. The different optical modes cause the variation of the chromatic dispersion profile and the effective nonlinearity, which induces different mechanisms of the SCG and changes the spectral range. The maximum SC spectral range covers 12.931 μm from 1.389 to 14.320 μm when pumped by the ${\mathrm{LP}}_{11}$ mode with the peak power of 1000 W at 3280 nm. The simulated results will be instructive for the experimental SCG up to the midinfrared waveband longer than 10 μm.

© 2018 Optical Society of America

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