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APS » Journals » Phys. Rev. Lett. » Volume 99 » Issue 12
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Phys. Rev. Lett. 99, 120501 (2007) [4 pages]

Nonclassical Interference and Entanglement Generation Using a Photonic Crystal Fiber Pair Photon Source

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Jérémie Fulconis1, Olivier Alibart1, Jeremy L. O’Brien1,2, William J. Wadsworth3, and John G. Rarity1
1Centre for Communications Research, Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol, BS8 1UB, United Kingdom
2H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, United Kingdom
3Centre for Photonics and Photonic Materials, Department of Physics, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom

Received 9 May 2007; published 17 September 2007

We demonstrate two key components for optical quantum information processing: a bright source of heralded single photons; and a bright source of entangled photon pairs. A pair of pump photons produces a correlated pair of photons at widely spaced wavelengths (583 nm and 900 nm), via a χ(3) four-wave mixing process. We demonstrate nonclassical interference between heralded photons from independent sources with a visibility of 95% (after correction for background), and an entangled photon pair source, with a fidelity of 89% with a Bell state.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.120501
DOI:
10.1103/PhysRevLett.99.120501
PACS:
03.67.−a, 42.50.−p, 42.65.−k
 
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