Generation of high-purity entangled photon pair in a short highly nonlinear fiber

Yong Meng Sua, John Malowicki, Masaaki Hirano, Kim Fook Lee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


We generate photon pairs at telecom wavelength through a spontaneous four-wave mixing process in a short 10mof highly nonlinear fiber. We use a counterpropagating scheme to generate a correlated and entangled photon pair. We observe coincidence to accidental-coincidence ratio of 29 ± 3 at room temperature (300 K) and as high as 130 ± 5 when the fiber is cooled to liquid-nitrogen temperature (77 K). Two-photon interference with visibility >98% (>92%) and the violation of Bell's inequality by >12 (̃5) standard deviation are observed at 77 K (300 K), respectively, without subtracting accidental-coincidence count. We obtain a photon-pair production rate about factor 3(2) higher than a 300 m dispersion-shifted fiber at 300 K (77 K).

Original languageEnglish (US)
Pages (from-to)73-75
Number of pages3
JournalOptics Letters
Issue number1
StatePublished - Jan 1 2013

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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