Spectral wings of the fiber supercontinuum and the dark-bright soliton interaction

TL;DR

This paper investigates how dark and bright solitons interact in optical fibers to produce spectral broadening and dispersive radiation, combining experimental and numerical insights into supercontinuum generation.

Contribution

It provides new experimental and numerical analysis of dark-bright soliton interactions and their role in supercontinuum spectral wings in optical fibers.

Findings

Dispersive radiation arises from dark-bright soliton interactions.

Bright and dark solitons contribute to spectral broadening.

Interaction causes continuous frequency shifts of dispersive pulses.

Abstract

We present experimental and numerical data on the supercontinuum generation in an optical fiber pumped in the normal dispersion range where the seeded dark and the spontaneously generated bright solitons contribute to the spectral broadening. We report the dispersive radiation arising from the interaction of the bright and dark solitons. This radiation consists of the two weak dispersing pulses that continuously shift their frequencies and shape the short and long wavelength wings of the supercontinuum spectrum.