Year: 2026
Type: conference-paper
Abstract: We report on the successful combination of a quantum channel operating at 810 nm and a classical channel at 1310 nm in a free-space laboratory experiment. The use of commercially available small form-factor pluggable (SFP) transceivers enabled the creation of the classical channel. Rigorous filtering ensured that the classical channel had no impact on the quantum channel, even when the classical channel was active during the alignment and calibration phases. Entanglement distribution was verified using the Clauser-Horne-Shimony-Holt (CHSH) inequality, and the measured value of |S|=2.58 remained unaffected regardless of whether the classical channel was active. These results demonstrate the feasibility of integrating quantum and classical communication channels in free space, paving the way for practical hybrid quantum-classical networks.
DOI: 10.3311/wins2026-004
Authors: Ákos Uzonyi, Máté Galambos
Institution: Budapest University of Technology and Economics
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: gold
OpenAlex ID: W7162484782