Application of the RK4IP Method for the Numerical Study of Noise-Like Pulses in Supercontinuum Generation

In this work, we focus on the numerical study of a NLP, generated by a figure-eight fiber laser (F8L), propagating in single-mode fiber (SMF-28) and photonic crystal fiber (PCF) through the RK4IP method. We have performed a numerical study in the evolution of supercontinuum spectra by varying the input power of NLP, using even lower input powers than those used with ultrashort pulses. Our main purpose is to highlight the NLPs are an excellent seed for wide, soft and in particular, flattened spectra.