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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 11 — Apr. 10, 2008
  • pp: 1832–1836

Generation of entangled photon pairs using small-coherence-time continuous wave pump lasers

Simone Cialdi, Fabrizio Castelli, Ilario Boscolo, and Matteo G.A. Paris  »View Author Affiliations


Applied Optics, Vol. 47, Issue 11, pp. 1832-1836 (2008)
http://dx.doi.org/10.1364/AO.47.001832


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Abstract

We address the generation of entangled photon pairs by parametric downconversion from solid state cw lasers with small coherence time. We consider a compact and low-cost setup based on a two-crystal scheme with type-I phase matching. We reconstruct the full density matrix by quantum tomography and analyze in detail the entanglement properties of the generated state as a function of the crystal’s length and the coherence time of the pump. We verify the possibility to improve the visibility using a purification protocol based on a compensation crystal.

© 2008 Optical Society of America

OCIS Codes
(270.1670) Quantum optics : Coherent optical effects
(270.5290) Quantum optics : Photon statistics

ToC Category:
Quantum Optics

History
Original Manuscript: November 12, 2007
Revised Manuscript: January 17, 2008
Manuscript Accepted: January 18, 2008
Published: April 8, 2008

Citation
Simone Cialdi, Fabrizio Castelli, Ilario Boscolo, and Matteo G. Paris, "Generation of entangled photon pairs using small-coherence-time continuous wave pump lasers," Appl. Opt. 47, 1832-1836 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-11-1832


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