Transverse coherence length of down-converted light in the two-photon state

E. J. S. Fonseca, C. H. Monken, S. Pádua, and G. A. Barbosa
Phys. Rev. A 59, 1608 – Published 1 February 1999
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Abstract

Measurements of the Young interference pattern for down-converted light in the two-photon state are performed. Light in the two-photon state is generated at the output of a Hong-Ou-Mandel balanced interferometer. Two-photon interference patterns with visibilities up to 100% are obtained. Visibilities of the two-photon interference patterns as a function of the double-slit separation are obtained and show that the transverse coherence length of the two-photon light is much larger than the one-photon beam for the distances considered in the experiment.

  • Received 9 June 1998

DOI:https://doi.org/10.1103/PhysRevA.59.1608

©1999 American Physical Society

Authors & Affiliations

E. J. S. Fonseca, C. H. Monken, and S. Pádua*

  • Departamento de Física, Universidade Federal de Minas Gerais, Caixa Postal 702, 30123-970 Belo Horizonte MG, Brazil

G. A. Barbosa

  • Departamento de Física, Universidade Federal de Alagoas, Cidade Universitária, 57072-970 Maceió Al, Brazil

  • *Author to whom correspondence should be addressed. Electronic address: spadua@fisica.ufmg.br

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Vol. 59, Iss. 2 — February 1999

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