Quantum key distribution over 25 km using a fibre set-up based on continuous variables
Laboratoire Charles Fabry de l'Institut d'Optique, Campus Polytechnique, RD 128, 91127 Palaiseau Cedex, France
2 Thales Research and Technology-France, RD 128, 91767 Palaiseau Cedex, France
3 Georgia-Tech Lorraine-CNRS Telecom, 2-3 rue Marconi, 57070 Metz, France
Corresponding author: firstname.lastname@example.org
We describe a continuous variable quantum key distribution set-up allowing for secret key rates over 2 kbits/s on a 25 km fibre link. The signal and the phase reference are time-multiplexed in the same fibre. The system is designed to be operated on an installed fibre link. The reconciliation step is performed using fast and efficient LDPC error correcting codes.
© EDP Sciences, 2008