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Nonlinear Optics: Materials, Fundamentals and Applications
We have efficiently generated colinearly-propagating entangled photon pairs from a nondegenerate type-I and a degenerate type-II quasi-phase matched parametric downconverter based on periodically poled lithium niobate and potassium titanyl phosphate. Entangled photons are essential in many quantum information applications such as quantum communications, implementation of quantum computation algorithms, and cryptographic key distributions. Typically UV-pumped optical parametric downconversion indoi:10.1364/nlo.2002.fc8 fatcat:ku4a6uyvgffvfihyaxdivllazu