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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 5 — May. 1, 2008
  • pp: 734–740

Two channels of entangled twin photons generated by quasi-phase-matched spontaneous parametric down-conversion in periodically poled lithium niobate crystals

Shiming Gao and Changxi Yang  »View Author Affiliations


JOSA B, Vol. 25, Issue 5, pp. 734-740 (2008)
http://dx.doi.org/10.1364/JOSAB.25.000734


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Abstract

We propose the generation of two-channel time-energy entangled twin photons based on two simultaneous first-order quasi-phase-matched (QPM) spontaneous parametric down-conversion processes in a periodically poled lithium niobate (PPLN) with a monochromatic pump. The theoretical model for the generation of the entangled photons is established, and the analytical solution is obtained in a lossless crystal with an undepleted pump assumption. The generated condition of entangled photons is achieved in terms of the QPM grating period and the pump wavelength. It is shown that two channels of entangled twin photons with different wavelengths can be created by suitably choosing the PPLN grating period once the pump wavelength is fixed, which provides the potential to introduce the wavelength division multiplexed technique into quantum information systems.

© 2008 Optical Society of America

OCIS Codes
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(270.0270) Quantum optics : Quantum optics

ToC Category:
Quantum Optics

History
Original Manuscript: August 21, 2007
Revised Manuscript: January 29, 2008
Manuscript Accepted: February 21, 2008
Published: April 16, 2008

Citation
Shiming Gao and Changxi Yang, "Two channels of entangled twin photons generated by quasi-phase-matched spontaneous parametric down-conversion in periodically poled lithium niobate crystals," J. Opt. Soc. Am. B 25, 734-740 (2008)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-25-5-734


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