Homodyne QPSK Detection for Quantum Key Distribution
M. B. Costa e Silva, Q. Xu, S. Agnolini, P. Gallion, F. J. Mendieta
Abstract
We present a QKD system with fainted pulses using self-homodyne coherent detection in optical fibers at 1543nm. BB84 protocol key is encoded in the optical phase using a twoelectrode Mach-Zehnder modulator, producing a QPSK modulation.
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