Phase-stable source of polarization-entangled photons in a linear double-pass configuration

Autor(en)

Fabian Steinlechner, Sven Ramelow, Marc Jofre, Marta Gilaberte, Thomas Jennewein, Juan. P. Torres, Morgan W. Mitchell, Valerio Pruneri

Abstrakt

We demonstrate a compact, robust, and highly efficient source of

polarization-entangled photons, based on linear bi-directional

down-conversion in a novel ‘folded sandwich’ configuration.

Bi-directionally pumping a single periodically poled KTiOPO₄

(ppKTP) crystal with a 405-nm laser diode, we generate entangled photon

pairs at the non-degenerate wavelengths 784 nm (signal) and 839 nm

(idler), and achieve an unprecedented detection rate of 11.8 kcps for

10.4 μW of pump power (1.1 million pairs / mW), in a 2.9-nm

bandwidth, while maintaining a very high two-photon entanglement

quality, with a Bell-state fidelity of 99.3 ± 0.3%.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

The Institute of Photonic Sciences, Universitat Politècnica de Catalunya, Institució Catalana de Recerca i Estudis Avançats (ICREA), University of Waterloo (UW)

Journal

Optics Express

Band

21

Seiten

11943-11951

Anzahl der Seiten

9

ISSN

1094-4087

DOI

https://doi.org/10.1364/OE.21.011943

Publikationsdatum

05-2013

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/b666ae43-b1dc-4d7f-a06c-8ba60992dc28