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Toward a reconfigurable quantum network enabled by a broadband entangled source

Toward a reconfigurable quantum network enabled by a broadband entangled source
Toward a reconfigurable quantum network enabled by a broadband entangled source

We present a proof-of-principle experimental demonstration of a reconfigurable entanglement distribution scheme utilizing a poled fiber-based source of broadband polarization-entangled photon pairs and dense wavelength-division multiplexing. A large bandwidth (>90 nm, centered at 1555 nm) and highly spectrally correlated nature of the entangled source can be exploited to allow for the generation of more than 25 frequency-conjugate entangled pairs when aligned to the standard 200 GHz ITU grid. In this work, three frequency-conjugate entangled pairs are used to demonstrate quantum key distribution, with the wavelength-selective switching done manually. The entangled pairs are delivered over 40 km of actual fiber, and an estimated secure key rate of up to 20 bits/s per bi-party is obtained.

0740-3224
B1-B6
Zhu, Eric Y.
a5837a40-5106-401b-b2a7-f7b421325d02
Corbari, Costantino
273904e8-5f90-4110-bc17-3d3f2c27d461
Gladyshev, Alexey
f178f1b2-c3fa-4b63-96e8-b6e356218b84
Kazansky, Peter G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Lo, Hoi Kwong
f4e379e7-d920-462c-b756-b107ca00eb56
Qian, And L.I.
6c598eb7-34e6-49f6-b1ba-faf72f67570c
Zhu, Eric Y.
a5837a40-5106-401b-b2a7-f7b421325d02
Corbari, Costantino
273904e8-5f90-4110-bc17-3d3f2c27d461
Gladyshev, Alexey
f178f1b2-c3fa-4b63-96e8-b6e356218b84
Kazansky, Peter G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Lo, Hoi Kwong
f4e379e7-d920-462c-b756-b107ca00eb56
Qian, And L.I.
6c598eb7-34e6-49f6-b1ba-faf72f67570c

Zhu, Eric Y., Corbari, Costantino, Gladyshev, Alexey, Kazansky, Peter G., Lo, Hoi Kwong and Qian, And L.I. (2019) Toward a reconfigurable quantum network enabled by a broadband entangled source. Journal of the Optical Society of America B: Optical Physics, 36 (3), B1-B6. (doi:10.1364/JOSAB.36.0000B1).

Record type: Article

Abstract

We present a proof-of-principle experimental demonstration of a reconfigurable entanglement distribution scheme utilizing a poled fiber-based source of broadband polarization-entangled photon pairs and dense wavelength-division multiplexing. A large bandwidth (>90 nm, centered at 1555 nm) and highly spectrally correlated nature of the entangled source can be exploited to allow for the generation of more than 25 frequency-conjugate entangled pairs when aligned to the standard 200 GHz ITU grid. In this work, three frequency-conjugate entangled pairs are used to demonstrate quantum key distribution, with the wavelength-selective switching done manually. The entangled pairs are delivered over 40 km of actual fiber, and an estimated secure key rate of up to 20 bits/s per bi-party is obtained.

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More information

Accepted/In Press date: 12 November 2018
e-pub ahead of print date: 12 November 2018
Published date: 1 March 2019

Identifiers

Local EPrints ID: 429052
URI: http://eprints.soton.ac.uk/id/eprint/429052
ISSN: 0740-3224
PURE UUID: 81bb4a64-9ed2-4b73-9334-4019366a80a5

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Date deposited: 20 Mar 2019 17:30
Last modified: 21 Oct 2021 16:54

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Contributors

Author: Eric Y. Zhu
Author: Costantino Corbari
Author: Alexey Gladyshev
Author: Hoi Kwong Lo
Author: And L.I. Qian

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