Ultrabright Polarization-Entangled Photon Pair Source for Frequency-Multiplexed Quantum Communication in Free-Space

  title={Ultrabright Polarization-Entangled Photon Pair Source for Frequency-Multiplexed Quantum Communication in Free-Space},
  author={Emma Brambila and Rodrigo G'omez and Riza Fazili and Markus Grafe and Fabian Steinlechner Fraunhofer Institute for Applied Optics and Precision Engineering Iof and Jena and Germany and Institute of Applied Physics and Abbe Center of Photonics and Friedrich-Schiller-Universitat Jena},
  journal={Optics Express},
: The distribution of entanglement via satellite links will drastically extend the reach of quantum networks. Highly efficient entangled photon sources are an essential requirement towards overcoming high channel loss and achieving practical transmission rates in long-distance satellite downlinks. Here we report on an ultrabright entangled photon source that is optimized for long-distance free-space transmission. It operates in a wavelength range that is efficiently detected with space-ready single… 

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