The University of Southampton
University of Southampton Institutional Repository

Direct generation of polarization-entangled photon pairs in a poled fiber

Direct generation of polarization-entangled photon pairs in a poled fiber
Direct generation of polarization-entangled photon pairs in a poled fiber
We experimentally demonstrate the direct generation of polarization-entangled photon pairs in an optical fiber at room temperature by exploiting type-II phase-matched spontaneous parametric down-conversion. A second-order nonlinearity is artificially induced in the 17-cm-long weakly birefringent step-index fiber through the process of thermal poling, and quasi-phase-matching allows for the generation of entangled photons in the 1.5-micron telecom band when the fiber is pumped at 775 nm. A greater-than 80:1 coincidence-to-accidental ratio is achieved, limited mainly by multiphoton pair generation. Without the need to subtract accidentals or to compensate for walk-off, the raw two-photon interference visibility is found to be better than 95%, and violation of Bell’s inequality is observed by more than 18 standard deviations. This makes for a truly alignment-free, plug-and-play source of polarization-entangled photon pairs.
213902-[5pp]
Zhu, Eric
c791d653-84db-47d4-ab9f-cf6ca92e0e6f
Tang, Zhiyuan
e76813ab-80f4-47be-979d-6b6a0a76c785
Qian, Li
3e26e957-afd2-407a-8fa8-6f15b0f70ea3
Helt, Lukas
391d6ec6-0f00-453c-a00e-3a5af4efd17f
Liscidini, Marco
77d70f8f-99da-40e3-a1a6-464049de4ab8
Sipe, J.E.
08c32725-d093-44ce-99ec-889cf4c70ee8
Corbari, Costantino
273904e8-5f90-4110-bc17-3d3f2c27d461
Canagasabey, Albert
2710a07f-176d-414d-b8a4-1967639ce31d
Ibsen, Morten
22e58138-5ce9-4bed-87e1-735c91f8f3b9
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Zhu, Eric
c791d653-84db-47d4-ab9f-cf6ca92e0e6f
Tang, Zhiyuan
e76813ab-80f4-47be-979d-6b6a0a76c785
Qian, Li
3e26e957-afd2-407a-8fa8-6f15b0f70ea3
Helt, Lukas
391d6ec6-0f00-453c-a00e-3a5af4efd17f
Liscidini, Marco
77d70f8f-99da-40e3-a1a6-464049de4ab8
Sipe, J.E.
08c32725-d093-44ce-99ec-889cf4c70ee8
Corbari, Costantino
273904e8-5f90-4110-bc17-3d3f2c27d461
Canagasabey, Albert
2710a07f-176d-414d-b8a4-1967639ce31d
Ibsen, Morten
22e58138-5ce9-4bed-87e1-735c91f8f3b9
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c

Zhu, Eric, Tang, Zhiyuan, Qian, Li, Helt, Lukas, Liscidini, Marco, Sipe, J.E., Corbari, Costantino, Canagasabey, Albert, Ibsen, Morten and Kazansky, Peter (2012) Direct generation of polarization-entangled photon pairs in a poled fiber. Physical Review Letters, 108 (21), 213902-[5pp]. (doi:10.1103/PhysRevLett.108.213902).

Record type: Article

Abstract

We experimentally demonstrate the direct generation of polarization-entangled photon pairs in an optical fiber at room temperature by exploiting type-II phase-matched spontaneous parametric down-conversion. A second-order nonlinearity is artificially induced in the 17-cm-long weakly birefringent step-index fiber through the process of thermal poling, and quasi-phase-matching allows for the generation of entangled photons in the 1.5-micron telecom band when the fiber is pumped at 775 nm. A greater-than 80:1 coincidence-to-accidental ratio is achieved, limited mainly by multiphoton pair generation. Without the need to subtract accidentals or to compensate for walk-off, the raw two-photon interference visibility is found to be better than 95%, and violation of Bell’s inequality is observed by more than 18 standard deviations. This makes for a truly alignment-free, plug-and-play source of polarization-entangled photon pairs.

Full text not available from this repository.

More information

Published date: 21 May 2012
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 341151
URI: https://eprints.soton.ac.uk/id/eprint/341151
PURE UUID: 6da8b60e-0c81-4f03-8788-98a27a70e5d6

Catalogue record

Date deposited: 16 Jul 2012 15:19
Last modified: 06 Aug 2019 18:54

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×