We simulate supercontinuum generation for various shapes of a dispersion varying As₂S₃ waveguides on MgF₂ substrate with air cladding. The supercontinuum generation is simulated for pulses of 2000 W peak power and 50 fs pulse width centered at 1.55 μm wavelength. For a uniform waveguide the generated spectrum is considerably narrower than that for a non-uniform waveguide. This is because the non-uniform waveguide allows a continuous phase matching of the generated waves through nonlinear interaction. We have demonstrated that a high coefficient of nonlinear refractive index is necessary for generating supercontinuum with large bandwidths. Larger supercontinuum bandwidth is predicted for waveguides with increasing As₂S₃ thickness along the propagation direction.

Date Published: 14 May 2019
PDF: 12 pages
Proc. SPIE 11000, Fiber Optic Sensors and Applications XVI, 110000A (14 May 2019); doi: 10.1117/12.2518245

Published in SPIE Proceedings Vol. 11000:
Fiber Optic Sensors and Applications XVI
Robert A. Lieberman; Glen A. Sanders; Ingrid U. Scheel, Editor(s)