Tailored photon-pair generation in optical fibers
arXiv:0809.0071 · doi:10.1103/PhysRevLett.102.123603
Abstract
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 , while theoretical analysis and preliminary tests suggest 94.5% purity is possible with a much longer fiber.
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