Three-color Sagnac source of polarization-entangled photon pairs

Autor(en)

Michael Hentschel, Hannes Hübel, Andreas Poppe, Anton Zeilinger

Abstrakt

We demonstrate a compact and stable source of polarizationentangled pairs of photons, one at 810 nm wavelength for high detection efficiency and the other at 1550 nm for long-distance fiber communication networks. Due to a novel Sagnac-based design of the interferometer no active stabilization is needed. Using only one 30 mm ppKTP bulk crystal the source produces photons with a spectral brightness of 1.13 × 106 pairs/s/mW/THz with an entanglement fidelity of 98.2%. Both photons are single-mode fiber coupled and ready to be used in quantum key distribution (QKD) or transmission of photonic quantum states over large distances.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Österreichische Akademie der Wissenschaften (ÖAW)

Journal

Optics Express

Band

17

Seiten

23153-23159

Anzahl der Seiten

7

DOI

https://doi.org/10.1364/OE.17.023153

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/1a9095b3-e6f7-4277-b371-84bbf85029f3