Implications of a zero-nonlinearity wavelength in optical fibers doped with silver nanoparticles

TL;DR

This paper investigates how the coexistence of zero-nonlinearity and zero-dispersion wavelengths in silver nanoparticle-doped photonic crystal fibers influences soliton dynamics and supercontinuum generation, revealing unique nonlinear optical behaviors.

Contribution

It provides a numerical analysis of the combined effects of zero-nonlinearity and zero-dispersion wavelengths on soliton evolution in doped fibers, highlighting novel phenomena.

Findings

Negative nonlinearity enables soliton formation in normal dispersion regions

Zero-nonlinearity wavelength acts as a barrier to Raman red shift

Unique soliton behaviors due to combined zero-nonlinearity and zero-dispersion effects

Abstract

Photonic crystal fibers doped with silver nanoparticles exhibit the Kerr nonlinearity that can be positive or negative depending on wavelength and vanishes at a specific wavelength. We study numerically how the simultaneous presence of a zero-nonlinearity wavelength (ZNW) and a zero-dispersion wavelength affects evolution of soliton and supercontinuum generation inside such fibers and find a number of unique features. The existence of negative nonlinearity allows soliton formation even in the normaldispersion region of the fiber, and the ZNW acts as a barrier for the Raman-induced red shift of solitons.