Polarization-Differential Loss Enabled High Polarization Extinction in Hollow-Core Fibers

TL;DR

This paper introduces a novel hollow-core fiber design that incorporates a polarization differential loss mechanism to achieve high and stable polarization extinction ratios, overcoming limitations of existing fibers.

Contribution

The study presents a new fiber architecture embedding PDL directly into the cladding, enabling stable high polarization extinction in hollow-core fibers.

Findings

Achieved high polarization extinction ratio in HCFs

Demonstrated stability under mechanical disturbances

Enhanced polarization control in fiber systems

Abstract

Delivering a well defined state of polarization over hollow core fibres (HCFs) is pivotal for next generation ultra stable photonic systems. Yet in all existing HCFs, whether birefringent or not, their polarization extinction ratio (PER) rapidly deteriorates during propagation or under mechanical disturbance, leaving no practical high and stable PER solution. Here, we break this impasse by embedding a polarization differential loss (PDL) mechanism directly into the cladding architecture.