New high-intensity source of polarization-entangled photon pairs

Paul G. Kwiat, Klaus Mattle, Harald Weinfurter, Anton Zeilinger, Alexander V. Sergienko, Yanhua Shih

Research output: Contribution to journalArticlepeer-review

Abstract

We report on a high-intensity source of polarization-entangled photon pairs with high momentum definition. Type-II noncollinear phase matching in parametric down conversion produces true entanglement: No part of the wave function must be discarded, in contrast to previous schemes. With two-photon fringe visibilities in excess of 97%, we demonstrated a violation of Bell's inequality by over 100 standard deviations in less than 5 min. The new source allowed ready preparation of all four of the EPR-Bell states.

Original languageEnglish (US)
Pages (from-to)4337-4341
Number of pages5
JournalPhysical review letters
Volume75
Issue number24
DOIs
StatePublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy

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