Light localization in hollow core fibers with a complicated shape of the core cladding boundary

TL;DR

This paper provides a comprehensive theoretical and numerical study of light localization mechanisms in complex-shaped hollow core fibers, introducing new models and analyzing various symmetry and curvature effects.

Contribution

It introduces new models for light localization in hollow core fibers with complex boundaries, expanding understanding beyond traditional models like ARROW.

Findings

Localization mechanisms depend on boundary shape and symmetry

Negative curvature enhances light confinement

Polygonal core shapes influence localization properties

Abstract

In this paper we present a theoretical and numerical analysis of light localization in hollow core microstructured fibers (HCMFs) with a complicated shape of the core cladding boundary. The analysis is based on well established models (for example, the ARROW model) and also on the models proposed for the first time. In particular, we consider local and nonlocal mechanisms of light localization in the waveguide structures with a determined type of discrete rotational symmetry of the core cladding boundary. We interpret and analyze mechanisms of light localization in negative curvature hollow core microstructured fibers (NC HCMFs) and simplified HC PCFs with a polygonal shape of the core cladding boundary.