Normal dispersion supercontinuum reaching mid-infrared in silica microstructured optical fibers

Abstract

In this work we determine the optimal pumping conditions such as pulse peak power, central wavelength and duration for optimized microstructured fibers proposed in (J.Biedrzycki, Opto-Electronics Review 26 (1):57-62, 2018). To study the influence of pumping parameters on the SC characteristics (its width and flatness) we use a self-developed software solving the generalized nonlinear Schr"odinger equation (GNLSE) with the fourth-order Runge-Kutta in the Interaction Picture (RK4IP) method. In the simulations, we assume the Raman response function as given by Stolen. Additionally, we accounted for dispersion of effective mode area using the envelope normalization proposed by Laegsgaard and loss. Our simulations show that ANDi SC generated in proposed fibers covers whole transparency window of silica glass.