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Optics Letters

Optics Letters


  • Vol. 29, Iss. 23 — Dec. 1, 2004
  • pp: 2794–2796

Experimental demonstration of a pure third-order optical parametric downconversion process

J. Douady and B. Boulanger  »View Author Affiliations

Optics Letters, Vol. 29, Issue 23, pp. 2794-2796 (2004)

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We report what is, to the best of our knowledge, the first experiment on third-order optical difference frequency generation. The nonlinear medium is a phase-matched KTiOPO4 crystal pumped at 532 and 1665 nm in the picosecond regime. The proposed experimental configuration leads to an efficient and pure cubic process, with generation of 4.5μJ/pulse at 1474 nm. This result opens the way to new quantum experiments on three-photon Greenberger–Horne–Zeilinger entanglement.

© 2004 Optical Society of America

OCIS Codes
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(270.6570) Quantum optics : Squeezed states

J. Douady and B. Boulanger, "Experimental demonstration of a pure third-order optical parametric downconversion process," Opt. Lett. 29, 2794-2796 (2004)

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