Impact of core cladding boundary shape on the waveguide properties of hollow core microstructured fibers

TL;DR

This paper investigates how the shape of the core cladding boundary affects waveguide properties in hollow core microstructured fibers, focusing on light localization mechanisms influenced by boundary geometry and symmetry.

Contribution

It introduces new models for analyzing the interaction between core modes and boundary shapes, highlighting the role of boundary symmetry in light localization.

Findings

Shape of boundary walls influences light localization

Polygonal boundary symmetry affects mode behavior

Negative curvature boundaries enhance localization mechanisms

Abstract

In this paper we consider an interaction between the air core modes of hollow core waveguide microstructures and core cladding boundary walls in various shapes. The analysis is based on well established models such as the anti-resonant reflecting optical waveguide model and on the models proposed for the first time. In particular, we consider the dynamics of light localization in the polygonalcore cladding boundary wall as dependant on the type of its discrete rotational symmetry. Based on our findings we analyze the mechanisms of light localization in the core cladding boundary walls of negative curvature hollow core microstructured fibers.