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Efficient single-spatial-mode PPKTP waveguide source for high dimensional entanglement-based QKD

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Abstract

8.9×108/s single-spatial-mode time-energy entangled photon pairs at 1.56 μm are efficiently generated in a PPKTP waveguide, demonstrating Mbps key rates and 93.3% Franson quantum-interference visibility using high speed self-differencing InGaAs detectors.

© 2012 Optical Society of America

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