Photon Counting and Super Homodyne Detection of Weak QPSK Signals for Quantum Key Distribution
Q. XU, M. B. Costa e Silva, S. Agnolini, P. Gallion, F. J. Mendieta
Abstract
We 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.
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