2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/119719We compare the principles and experimental results of two different QPSK signal detection configurations, photon counting and super homodyning, for applications in fiber-optic Quantum Key Distribution (QKD) systems operating at telecom wavelength, using the BB84 protocol.2 pages, 3 figues, EOS Annual Meeting 2006, Topical Meeting on Extreme Optics (QEOD/EPS), Paris, Oct. 2006Quantum Physicstext