en
Scientific article
Open access
English

Experimental polarization encoded quantum key distribution over optical fibres with real-time continuous birefringence compensation

Published inNew journal of physics, vol. 11, no. 4, 045015
Publication date2009
Abstract

In this paper we demonstrate an active polarization drift compensation scheme for optical fibres employed in a quantum key distribution experiment with polarization encoded qubits. The quantum signals are wavelength multiplexed in one fibre along with two classical optical side channels that provide the control information for the polarization compensation scheme. This set-up allows us to continuously track any polarization change without the need to interrupt the key exchange. The results obtained show that fast polarization rotations of the order of 40π rad s–1 are effectively compensated for. We demonstrate that our set-up allows continuous quantum key distribution even in a fibre stressed by random polarization fluctuations. Our results pave the way for Bell-state measurements using only linear optics with parties separated by long-distance optical fibres.

Citation (ISO format)
XAVIER, G. B. et al. Experimental polarization encoded quantum key distribution over optical fibres with real-time continuous birefringence compensation. In: New journal of physics, 2009, vol. 11, n° 4, p. 045015. doi: 10.1088/1367-2630/11/4/045015
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal1367-2630
573views
244downloads

Technical informations

Creation05/13/2014 3:29:00 PM
First validation05/13/2014 3:29:00 PM
Update time03/14/2023 9:13:52 PM
Status update03/14/2023 9:13:52 PM
Last indexation05/02/2024 3:11:46 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack