Generation of high-purity telecom-band entangled pjioton pairs in dispersion-shifted fiber

Kim Fook Lee*, Jun Chen, Chuang Liang, Xiaoying Li, Paul L. Voss, Prem Kumar

*Corresponding author for this work

Research output: Contribution to journalArticle

103 Scopus citations

Abstract

We study the purity of correlated photon pairs generated in a dispersion-shifted fiber at various temperatures. The ratio of coincidence to accidental-coincidence counts greater than 100 can be obtained as the fiber is cooled to liquid-nitrogen temperature (77 K). We then generate polarization-entangled photon pairs by using a compact counterpropagating scheme. Two-photon interference with visibility >98% and Bell's inequality violation by >8 standard deviations of measurement uncertainty are observed at 77 K, without subtracting the accidental-coincidence counts due to background Raman photons.

Original languageEnglish (US)
Pages (from-to)1905-1907
Number of pages3
JournalOptics Letters
Volume31
Issue number12
DOIs
StatePublished - Jun 15 2006

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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