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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 7 — Apr. 7, 2014
  • pp: 8624–8632

High-visibility nonclassical interference of photon pairs generated in a multimode nonlinear waveguide

Michał Jachura, Michał Karpiński, Czesław Radzewicz, and Konrad Banaszek  »View Author Affiliations

Optics Express, Vol. 22, Issue 7, pp. 8624-8632 (2014)

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We report measurements of two-photon interference using a cw-pumped type-II spontaneous parametric down-conversion source based on a multimode perodically poled potassium titanyl phosphate (PPKTP) waveguide. We have used the recently demonstrated technique of controlling the spatial characteristics of the down-conversion process via intermodal dispersion to generate photon pairs in fundamental transverse modes, thus ensuring their spatial indistinguishability. Good overlap of photon modes within the pairs has been verified using the Hong-Ou-Mandel interferometer and the preparation of polarization entanglement in the Shih-Alley configuration, yielding visibilities consistently above 90%.

© 2014 Optical Society of America

OCIS Codes
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(230.7370) Optical devices : Waveguides
(270.0270) Quantum optics : Quantum optics

ToC Category:
Quantum Optics

Original Manuscript: January 20, 2014
Revised Manuscript: March 11, 2014
Manuscript Accepted: March 11, 2014
Published: April 3, 2014

Michał Jachura, Michał Karpiński, Czesław Radzewicz, and Konrad Banaszek, "High-visibility nonclassical interference of photon pairs generated in a multimode nonlinear waveguide," Opt. Express 22, 8624-8632 (2014)

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