Enhancements to quantum communication performance utilizing a prototype photonic lantern and multiplexed single-photon detection

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Abstract

The optical interfacing between a free-space channel and single-photon detectors (SPDs) can greatly impact the inherent performance of a free-space quantum key distribution receiver. Direct coupling to detectors creates engineering challenges, and a single-mode fiber requires adaptive optics. Using a multimode fiber (MMF) is common; however, larger core diameters limit the achievable bandwidth. We demonstrate a prototype multimode fiber-based photonic lantern that allows us to retain the benefits of the large multimode coupling while transitioning to multiple, less multimodal fibers, reducing bandwidth limitation.

Original languageEnglish
Pages (from-to)5252-5255
Number of pages4
JournalOptics Letters
Volume49
Issue number18
Early online date11 Sept 2024
DOIs
Publication statusPublished - 15 Sept 2024

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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