arXiv:quant-ph/0611100 · Optical Amplifiers and Their Applications

Homodyne QPSK Detection for Quantum Key Distribution

M. B. Costa e Silva, Qing Xu, S. Agnolini, Philippe B. Gallion, Francisco Javier Mendieta

Published Jan 1, 2006• 4 citations

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 two-electrode Mach-Zehnder modulator, producing a QPSK modulation.

DOI: 10.1364/cota.2006.cfa2

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