1.
Opt Lett
; 34(10): 1606-8, 2009 May 15.
Artigo
em Inglês
| MEDLINE
| ID: mdl-19448836
RESUMO
We propose and demonstrate a polarization-independent, differential-phase-shift, quantum-key distribution system with upconversion detectors. Even though the detectors have polarization dependency, use of alternative polarization modulation and a two-bit delay interferometer achieves polarization-insensitive operation. In an experiment, sifted key bits were polarization-independently generated over 50 km fiber.