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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 18 — Sep. 5, 2005
  • pp: 6709–6722

Spatial and spectral mode selection of heralded single photons from pulsed parametric down-conversion

S. Castelletto, I. Degiovanni, V. Schettini, and A. Migdall  »View Author Affiliations

Optics Express, Vol. 13, Issue 18, pp. 6709-6722 (2005)

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We describe an experiment in which photon pairs from a pulsed parametric down-conversion (PDC) source were coupled into single-mode fibers with heralding efficiencies as high as 70%. Heralding efficiency or mode preparation efficiency is defined as the probability of finding a photon in a fiber in a definite state, given the detection of its twin. Heralding efficiencies were obtained for a range of down-conversion beam-size configurations. Analysis of spatial and spectral mode selection, and their mutual correlation, provides a practical guide for engineering PDC-produced single photons in a definite mode and spectral emission band. The spectrum of the heralded photons were measured for each beam configuration, to determine the interplay between transverse momentum and spectral entanglement on the preparation efficiency.

© 2005 Optical Society of America

OCIS Codes
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(270.0270) Quantum optics : Quantum optics
(270.4180) Quantum optics : Multiphoton processes

ToC Category:
Research Papers

Original Manuscript: June 3, 2005
Revised Manuscript: August 9, 2005
Published: September 5, 2005

S. Castelletto, I. Degiovanni, V. Schettini, and A. Migdall, "Spatial and spectral mode selection of heralded single photons from pulsed parametric down-conversion," Opt. Express 13, 6709-6722 (2005)

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