SMF Coupled Compact Ground Terminal with Advanced Filtering Towards Daylight C Band Satellite QKD (2509.07667v1)

Published 9 Sep 2025 in physics.optics and quant-ph

Abstract: We demonstrate a compact, high-isolation C-band optical ground terminal for satellite QKD, achieving more than 120 dB daylight background suppression and 135 dB crosstalk noise isolation. Successful QKD over an outdoor 100m FSO validate its feasibility for integration of satellite-QKD with urban fiber segments.

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