Supercontinuum generation in a graded-index multimode tellurite fiber

TL;DR

This paper demonstrates a broad supercontinuum spanning from visible to mid-infrared in a nanostructured tellurite graded-index multimode fiber, with potential for high-power mid-infrared applications.

Contribution

It introduces a novel nanostructured tellurite graded-index multimode fiber for supercontinuum generation and provides detailed experimental and numerical analysis of its dynamics.

Findings

Supercontinuum spans from 790 nm to 2900 nm.

Near-single mode spatial distribution at high input energies.

Numerical simulations agree with experimental results.

Abstract

We report a near two-octave spanning supercontinuum (SC) from 790 nm to 2900 nm in a nanostructured tellurite graded-index multimode fiber with a nanostructured core. We study the SC dynamics in different dispersion regimes and observe near-single mode spatial intensity distribution at high input energy values. Numerical simulations of the (3+1)D generalized nonlinear Schr\"odinger equation are in good agreement with our experiments. Our results open a new avenue for the generation of high-power mid-infrared SC sources in soft glass fibers.