Matthew Pelton, P. Marsden, D. Ljunggren, M. Tengner, Anders Karlsson, A. Fragemann, C. Canalias, F. Laurell
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Bright source of polarization-entangled photons using periodically poled potassium titanyl phosphate (KTP)
We used two perpendicular crystals of periodically-poled potassium titanyl phosphate (KTP) to efficiently generate frequency-nondegenerate, polarization-entangled photons in a single spatial mode. The source is compact, inexpensive, and suitable for long-distance fiber-based quantum communication.
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