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Testing of feasibility of QKD system deployment in commercial metropolitan fiber networks

Authors:
Monika Jacak
Damian Melniczuk
Lucjan Jacak
Ireneusz Jozwiak
Piotr Jozwiak

Keywords: Quantum Key Distribution; TELECOM network; optical fibers; quantum cryptography; quantum entanglement; photon polarization

Abstract:
A description of test-assessment of TELECOM 1550 nm optical fiber used for a quantum channel in entangled Quantum Key Distribution (QKD) setup, EPR S405 Quelle (Austrian Institute of Technology) is presented. The system at work was observed and parameters related to dark quantum channel were collected by an appropriately designed test card. Series of measurements were carried out for various configurations of 1550 nm (optimal transmission wave-length) optical fiber patch-cord the same as used in standard metropolitan TELECOM networks including distances up to 6.5 km long. The particular attention has been paid to model the real lines with welding points and connectors in view of rigorous requirements regarded conservation of photon polarization in EPR S405 system. Tests allowed for assessment of Qantum Bit Error (QBER) level in standard telecommunication fiber infrastructure when trying to implement entangled QKD system vulnerable in particular to polarization perturbations. Another drawback, incommensurability of the central transmission wave-length in fiber with the wave-length of photons in EPR S405 system, was also assessed and the possibility of implementation of QKD EPR S405 system with 1550 nm optical fibers has been verified.

Pages: 70 to 75

Copyright: Copyright (c) IARIA, 2014

Publication date: July 20, 2014

Published in: conference

ISSN: 2308-3484

ISBN: 978-1-61208-365-0

Location: Paris, France

Dates: from July 20, 2014 to July 24, 2014