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Optica Sensing Congress

Quantum interferometer using a Hollow-Core Fibre

Thomas Produit, Tanmoy Chakraborty, Ang Deng, Wonkeun Chang, Anna V. Paterova

Published Jan 1, 2023• 1 citation
Publisher

Abstract

Here, we report the successful use of an Antiresonant Hollow-Core Fibre (AR-HCF) section in a quantum interferometer. This enhances the toolset available to quantum interferometer for sensing in the mid-infrared region.
DOI
10.1364/sensors.2023.sm3d.4

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State of the art classical and quantum communications rely on standard optical fibers with solid cores to transmit light over long distances. However, recent advances have led to the emergence of antiresonant hollow-core optical fibers (AR-HCFs), which, due to the novel fiber geometry, show remarkable optical guiding properties, which are not as limited by the material properties as solid-core fibers. In this paper, we explore the transmission of entangled photons through a novel 7.7 km AR-HCF in a laboratory environment at 1550 nm, presenting the first successful demonstration of entanglement distribution via a long AR-HCF. In addition to showing these novel fibers are compatible with long distance quantum communication, we highlight the low latency and low chromatic dispersion intrinsic to AR-HCF, which can increase the secure key rate in time-bin-based quantum key distribution protocols.