Time-bin entanglement at telecom wavelengths from a hybrid photonic integrated circuit

Autor(en)

Hannah Thiel, Lennart Jehle, Robert J. Chapman, Stefan Frick, Hauke Conradi, Moritz Kleinert, Holger Suchomel, Martin Kamp, Sven Höfling, Christian Schneider, Norbert Keil, Gregor Weihs

Abstrakt

Mass-deployable implementations for quantum communication require compact, reliable, and low-cost hardware solutions for photon generation, control and analysis. We present a fiber-pigtailed hybrid photonic circuit comprising nonlinear waveguides for photon-pair generation and a polymer interposer reaching 68dB of pump suppression and photon separation based on a polarizing beam splitter with >25dB polarization extinction ratio. The optical stability of the hybrid assembly enhances the quality of the entanglement, and the efficient background suppression and photon routing further reduce accidental coincidences. We thus achieve a 96-8+3% concurrence and a 96-5+2% fidelity to a Bell state. The generated telecom-wavelength, time-bin entangled photon pairs are ideally suited for distributing Bell pairs over fiber networks with low dispersion.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Leopold-Franzens-Universität Innsbruck, Eidgenössische Technische Hochschule Zürich, Julius-Maximilians-Universität Würzburg, Carl von Ossietzky Universität Oldenburg, Fraunhofer-Institut für Nachrichtentechnik

Journal

Scientific Reports

Band

14

Anzahl der Seiten

7

ISSN

2045-2322

DOI

https://doi.org/10.48550/arXiv.2309.00926

Publikationsdatum

05-2024

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik, 103021 Optik

ASJC Scopus Sachgebiete

General

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/5ce18d53-1449-4516-a777-a549ba940616