Poor-man's model of hollow-core anti-resonant fibers

TL;DR

This paper introduces a simplified analytical model for hollow-core anti-resonant fibers that accurately predicts dispersion and loss characteristics, enabling efficient exploration of fiber variations without extensive simulations.

Contribution

The paper presents a 'poor-man's' analytical model that mimics complex finite-element simulation results with minimal parameters, simplifying fiber design analysis.

Findings

Model accurately reproduces dispersion and loss resonances

Single fitting parameter suffices for good approximation

Facilitates rapid exploration of fiber parameter variations

Abstract

We investigate various methods for extending the simple analytical capillary model to describe the dispersion and loss of anti-resonant hollow-core fibers without the need of detailed finite-element simulations across the desired wavelength range. This poor-man's model can with a single fitting parameter quite accurately mimic dispersion and loss resonances and anti-resonances from full finite-element simulations. Due to the analytical basis of the model it is easy to explore variations in core size and cladding wall thickness, and should therefore provide a valuable tool for numerical simulations of the ultrafast nonlinear dynamics of gas-filled hollow-core fibers.