Solar-Blind QKD over Simplified Short-Range FSO Link
Florian Honz (1), Michael Hentschel (1), Philip Walther (2), Hannes, H\"ubel (1), Bernhard Schrenk (1) ((1) AIT Austrian Institute of Technology,, (2) University of Vienna, Faculty of Physics)
TL;DR
This paper demonstrates a solar-blind quantum key distribution (QKD) system over a simplified free-space optical link, showing robustness under daylight conditions and using large-core fiber for alignment.
Contribution
It introduces a practical outdoor QKD setup with simplified alignment and proves daylight stability of E-band QKD despite reduced spatial filtering.
Findings
Successful outdoor QKD over free-space link
Stable daylight operation of E-band QKD
Use of large-core fiber for alignment simplifies system
Abstract
We demonstrate QKD and data communication over an out-door free-space link where large-core fiber substitutes active alignment. We further prove E-band QKD as stable and robust under full daylight, despite the loss of spatial filtering.
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Taxonomy
TopicsOptical Wireless Communication Technologies · Optical Network Technologies · Advanced Fiber Optic Sensors