SAMOP 2023 – wissenschaftliches Programm

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QI: Fachverband Quanteninformation

QI 6: Poster I (joint session QI/Q)

QI 6.25: Poster

Montag, 6. März 2023, 16:30–19:00, Empore Lichthof

Investigation of the phase-space distribution of the BPSK-encoded optical coherent signal from a geostationary satellite — •Hüseyin Vural¹, Conrad Rössler¹, Andrew Reeves², Bastian Hacker¹, Thomas Dirmeier¹, Karen Saucke³, and Christoph Marquardt¹ — ¹Max-Planck Institut für die Physik des Lichts (MPL) — ²Deutsches Zentrum für Luft- und Raumfahrt (DLR) - Institut für Kommunikation und Navigation — ³Tesat Spacecom

Coherent optical communication between a satellite and a terrestrial ground station can facilitate classical as well as quantum-limited communication. In a recent paper, we demonstrated quantum limited signals from a geostationary satellite in a homodyning measurement, that indicate the viability of long-distance quantum key distribution (QKD) and global secure communication. Here, we investigate the phase-space distribution of the BPSK-encoded coherent signal from the same satellite, however at an optical ground station in an urban area and by heterodyning the quantum signal with a free running commercial laser. Our results indicate that scalable solutions for quantum-limited signals may be in reach.