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Engineered Photon-Pair Generation through Dual-Pump Spontaneous Four-Wave Mixing

Bin Fang, Offir Cohen, Jamy B. Moreno, Virginia O. Lorenz

Published Jan 1, 2013• 0 citations
Publisher

Abstract

We show one can engineer the spectral correlations of photon-pairs produced in optical fibers by employing the temporal walk-off between two distinct pumps in spontaneous four-wave mixing to create completely factorable states without spectral filtering.
DOI
10.1364/cleo_qels.2013.qth3c.1

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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.