3 papers
quant-ph2006
Integrating a QPSK Quantum Key Distribution Link
M. B. Costa e Silva, Q. Xu, S. Agnolini +4
We present the integration of the optical and electronic subsystems of a BB84-QKD fiber link. A highspeed FPGA MODEM generates the random QPSK sequences for a fiber-optic delayed s…
quant-ph2006
Homodyne QPSK Detection for Quantum Key Distribution
M. B. Costa e Silva, Q. Xu, S. Agnolini +2
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 twoelectro…
physics.optics2006
Homodyne detection for quantum key distribution: an alternative to photon counting in BB84 protocol
M. B. Costa e Silva, Q. Xu, S. Agnolini +2
This paper presents the principles and experimental results of an optical fiber QKD system operating at 1550 nm, and using the BB84 protocol with QPSK signals. Our experimental set…