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Communication system technology for demonstration of BB84 quantum key distribution in optical aircraft downlinks

Moll, Florian and Nauerth, Sebastian and Fuchs, Christian and Horwath, Joachim and Rau, Markus and Weinfurter, Harald (2012) Communication system technology for demonstration of BB84 quantum key distribution in optical aircraft downlinks. In: Proc. of SPIE Vol. 8517, pp. 851703-1. SPIE Press. Laser Communication and Propagation through the Atmosphere and Oceans, 13.-15. Aug. 2012, San Diego, USA. ISBN 9780819492340.

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Abstract

Quantum Key Distribution (QKD), either fiber based or free-space, allows for provably secure key distribution solely based on the laws of quantum mechanics. Feasibility of QKD systems in aircraft-ground links was demonstrated with a successful key exchange. Experiment flights were undertaken during night time at the site of the German Aerospace Center (DLR) Oberpfaffenhofen, Germany. The aircraft was a Dornier 228 equipped with a laser communication terminal, originally designed for optical data downlinks with intensity modulation and direct detection. The counter terminal on ground was an optical ground station with a 40 cm Cassegrain type receiver telescope. Alice and Bob, as the transmitter and receiver systems usually are called in QKD, were integrated in the flight and ground terminals, respectively. A second laser source with 1550 nm wavelength was used to transmit a 100 MHz signal for synchronization of the two partners. The so called BB84 protocol, here implemented with faint polarization encoded pulses at 850nm wavelength, was applied as key generation scheme. Within two flights, measurements of the QKD and communication channel could be obtained with link distance of 20 km. After link acquisition, the tracking systems in the aircraft and on ground were able to keep lock of the narrow QKD beam. Emphasis of this paper is put on presentation of the link technology, i.e. link design and modifications of the communication terminals. First analysis of link attenuation, performance of the QKD system and scintillation of the sync signal is also addressed.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Communication system technology for demonstration of BB84 quantum key distribution in optical aircraft downlinks
Authors:
AuthorsInstitution or Email of Authors
Moll, FlorianDLR
Nauerth, SebastianLMU
Fuchs, ChristianDLR
Horwath, JoachimDLR
Rau, MarkusLMU
Weinfurter, HaraldLMU
Date:2012
Journal or Publication Title:Proc. of SPIE Vol. 8517
Refereed publication:No
In ISI Web of Science:No
Page Range:pp. 851703-1
Publisher:SPIE Press
ISBN:9780819492340
Status:Published
Keywords:Quantum key distribution, free-space optical communication, aircraft-ground link, KNOCGOP
Event Title:Laser Communication and Propagation through the Atmosphere and Oceans
Event Location:San Diego, USA
Event Type:international Conference
Event Dates:13.-15. Aug. 2012
Organizer:SPIE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben Multimedia Satellitennetze
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Satellitennetze
Deposited By: Florian Moll
Deposited On:14 Nov 2012 09:48
Last Modified:05 Aug 2013 09:47

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