Share Email Print
cover

Proceedings Paper

Multi-user quantum key distribution with a semiconductor source of entangled photon pairs (Conference Presentation)
Author(s): Sara Ducci; Claire Autebert; Julien Trapateau; Adeline Orieux; Aristide Lemaître; Carmen Gomez Carbonell; Eleni Diamanti; Isabelle Zaquine
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

In view of real world applications of quantum information technologies, the combination of miniature quantum resources with existing fibre networks is a crucial issue. Among such resources, on-chip entangled photon sources play a central role for applications spanning quantum communications, computing and metrology. Here, we use a semiconductor source of entangled photons operating at room temperature in conjunction with standard telecom components to demonstrate multi-user quantum key distribution, a core protocol for securing communications in quantum networks. The source consists of an AlGaAs chip emitting polarization entangled photon pairs over a large bandwidth in the main telecom band around 1550 nm without the use of any off-chip compensation or interferometric scheme; the photon pairs are directly launched into a dense wavelength division multiplexer (DWDM) and secret keys are distributed between several pairs of users communicating through different channels. We achieve a visibility measured after the DWDM of 87% and show long-distance key distribution using a 50-km standard telecom fibre link between two network users. These results illustrate a promising route to practical, resource-efficient implementations adapted to quantum network infrastructures.

Paper Details

Date Published: 28 April 2017
PDF: 1 pages
Proc. SPIE 10111, Quantum Sensing and Nano Electronics and Photonics XIV, 101112J (28 April 2017); doi: 10.1117/12.2255093
Show Author Affiliations
Sara Ducci, Univ. Paris 7-Denis Diderot (France)
Claire Autebert, Univ. Paris 7-Denis Diderot (France)
Julien Trapateau, Lab. Traitement et Communication de l'Information (France)
Ctr. National de la Recherche Scientifique (France)
Adeline Orieux, Lab. Traitement et Communication de l'Information (France)
Ctr. National de la Recherche Scientifique (France)
Aristide Lemaître, Ctr. de Nanosciences et de Nanotechnologies (France)
Ctr. National de la Recherche Scientifique (France)
Carmen Gomez Carbonell, Ctr. de Nanosciences et de Nanotechnologies (France)
Ctr. National de la Recherche Scientifique (France)
Eleni Diamanti, Lab. Traitement et Communication de l'Information (France)
Ctr. National de la Recherche Scientifique (France)
Isabelle Zaquine, Lab. Traitement et Communication de l'Information (France)
Ctr. National de la Recherche Scientifique (France)


Published in SPIE Proceedings Vol. 10111:
Quantum Sensing and Nano Electronics and Photonics XIV
Manijeh Razeghi, Editor(s)

© SPIE. Terms of Use
Back to Top