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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 15 — Jul. 20, 2009
  • pp: 13059–13069

Coherence properties of spontaneous parametric down-conversion pumped by a multi-mode cw diode laser

Osung Kwon, Young-Sik Ra, and Yoon-Ho Kim  »View Author Affiliations

Optics Express, Vol. 17, Issue 15, pp. 13059-13069 (2009)

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Coherence properties of the photon pair generated via spontaneous parametric down-conversion pumped by a multi-mode cw diode laser are studied with a Mach-Zehnder interferometer. Each photon of the pair enters a different input port of the interferometer and the biphoton coherence properties are studied with a two-photon detector placed at one output port. When the photon pair simultaneously enters the interferometer, periodic recurrence of the biphoton de Broglie wave packet is observed, closely resembling the coherence properties of the pump diode laser. With non-zero delays between the photons at the input ports, biphoton interference exhibits the same periodic recurrence but the wave packet shapes are shown to be dependent on both the input delay as well as the interferometer delay. These properties could be useful for building engineered entangled photon sources based on diode laser-pumped spontaneous parametric down-conversion.

© 2009 Optical Society of America

OCIS Codes
(270.1670) Quantum optics : Coherent optical effects
(270.5290) Quantum optics : Photon statistics
(270.5565) Quantum optics : Quantum communications
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Quantum Optics

Original Manuscript: June 5, 2009
Revised Manuscript: July 9, 2009
Manuscript Accepted: July 9, 2009
Published: July 15, 2009

Osung Kwon, Young-Sik Ra, and Yoon-Ho Kim, "Coherence properties of spontaneous parametric down-conversion pumped by a multi-mode cw diode laser," Opt. Express 17, 13059-13069 (2009)

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