Photon Counting and Super Homodyne Detection of Weak QPSK Signals for Quantum Key Distribution
Qing Xu, M. B. Costa e Silva, S. Agnolini, P. Gallion, Francisco Javier Mendieta · arXiv (Cornell University) · 2006
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.