Highly multi-mode anti-resonant hollow core fibres

TL;DR

This paper characterizes highly multi-mode anti-resonant hollow core optical fibers guiding at least 50 modes with low propagation and bend losses, demonstrating their potential for broad infrared applications.

Contribution

It provides the first detailed characterization of multi-mode anti-resonant hollow core fibers guiding over 50 modes with low losses in the infrared range.

Findings

Propagation losses between 0.1 and 0.2 dB/m from 1000 to 1500 nm

Bend losses less than 3 dB/turn at 7.5 cm radius

Core radii over 60 times the guided wavelengths

Abstract

We report the characterisation of anti-resonant hollow core optical fibres guiding at least 50 spatial modes in the infrared. Their propagation losses were measured to be between 0.1 and 0.2 dB/m from 1000 to 1500 nm wavelength, with bend losses of less than 3 dB/turn for bend radii of 7.5 cm despite core radii greater than 60 times the guided wavelengths.