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Optics Letters

Optics Letters


  • Vol. 26, Iss. 11 — Jun. 1, 2001
  • pp: 843–845

Beamlike twin-photon generation by use of type II parametric downconversion

Shigeki Takeuchi  »View Author Affiliations

Optics Letters, Vol. 26, Issue 11, pp. 843-845 (2001)

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Beamlike twin-photon generation by use of type II spontaneous parametric downconversion is demonstrated. The intensity distribution of each beam is round, and the emission angle is very small (0.9°). As a result, a high coincidence-count rate per unit of pump power was recorded. The ratio of coincidence-count rate to single-count rate was estimated to be 80% in this experiment. These features suggest that this method is useful for generation of a single-photon state and is applicable to bright, entangled twin-photon sources.

© 2001 Optical Society of America

OCIS Codes
(270.0270) Quantum optics : Quantum optics
(270.4180) Quantum optics : Multiphoton processes
(270.5290) Quantum optics : Photon statistics

Shigeki Takeuchi, "Beamlike twin-photon generation by use of type II parametric downconversion," Opt. Lett. 26, 843-845 (2001)

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