Tailored photon-pair generation in optical fibers

Offir Cohen, Jeff S. Lundeen, Brian J. Smith, Graciana Puentes, Peter J. Mosley, Ian A. Walmsley

Research output: Contribution to journalArticlepeer-review


We experimentally control the spectral structure of photon pairs created via spontaneous four-wave mixing in microstructured fibers. By fabricating fibers with designed dispersion, one can manipulate the photons' wavelengths, joint spectrum, and, thus, entanglement. As an example, we produce photon pairs with no spectral correlations, allowing direct heralding of single photons in pure-state wave packets without filtering. We achieve an experimental purity of (85.9±1.6)%, while theoretical analysis and preliminary tests suggest that 94.5% purity is possible with a much longer fiber.

Original languageEnglish (US)
Article number123603
JournalPhysical review letters
Issue number12
StatePublished - Mar 23 2009
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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