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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 20, Iss. 9 — Sep. 1, 2003
  • pp: 1959–1966

Measurement of one-photon and two-photon wave packets in spontaneous parametric downconversion

Yoon-Ho Kim  »View Author Affiliations

JOSA B, Vol. 20, Issue 9, pp. 1959-1966 (2003)

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One-photon and two-photon wave packets of entangled two-photon states in spontaneous parametric downconversion (SPDC) fields are calculated and measured experimentally. For type II SPDC, measured one-photon and two-photon wave packets agree well with theory. For type I SPDC, the measured one-photon wave packet agrees with the theory. However, the two-photon wave packet is much bigger than the expected value, and the visibility of interference is low. We identify the sources of this discrepancy as the spatial filtering of the two-photon bandwidth and nonpair detection events caused by the detector apertures and the tuning-curve characteristics of the type I SPDC.

© 2003 Optical Society of America

OCIS Codes
(270.0270) Quantum optics : Quantum optics
(270.1670) Quantum optics : Coherent optical effects

Yoon-Ho Kim, "Measurement of one-photon and two-photon wave packets in spontaneous parametric downconversion," J. Opt. Soc. Am. B 20, 1959-1966 (2003)

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