A short wavelength GigaHertz clocked fiber-optic quantum key distribution system

A quantum key distribution (QKD) system has been developed, using a standard telecommunications optical fiber, which is capable of operating at clock rates of greater than 1 GHz. The QKD system implements a polarization encoded version of the B92 protocol. The system employs vertical-cavity surface-...

Full description

Saved in:
Bibliographic Details
Published in:IEEE journal of quantum electronics 2004-07, Vol.40 (7), p.900-908
Main Authors: Gordon, K.J., Fernandez, V., Townsend, P.D., Buller, G.S.
Format: Article
Language:English
Subjects:
Classical and quantum physics: mechanics and fields
Clocks
Distributed feedback devices
Exact sciences and technology
Fiber lasers
Laser feedback
Optical fiber polarization
Optical fibers
Physics
Quantum cryptography
Quantum information
Standards development
Surface emitting lasers
Telecommunication standards
Vertical cavity surface emitting lasers
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A quantum key distribution (QKD) system has been developed, using a standard telecommunications optical fiber, which is capable of operating at clock rates of greater than 1 GHz. The QKD system implements a polarization encoded version of the B92 protocol. The system employs vertical-cavity surface-emitting lasers with emission wavelengths of 850 nm as weak coherent light sources, and silicon single photon avalanche diodes as the single photon detectors. A distributed feedback laser of emission wavelength 1.3 /spl mu/m, and a linear gain germanium avalanche photodiode was used to optically synchronize individual photons over the standard telecommunications fiber. The QKD system exhibited a quantum bit error rate (QBER) of 1.4%, and an estimated net bit rate (NBR) greater than 100 000 bits/sup -1/ for a 4.2-km transmission range. For a 10-km fiber range, a QBER of 2.1%, and an estimated NBR of greater than 7000 bits/sup -1/ was achieved.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2004.830182