Photon coincidences in spontaneous parametric down-converted radiation excited by a blue LED in bulk LiIO_3 crystal
Justinas Galinis, Michał Karpiński, G. Tamošauskas, Krzysztof Dobek, A. Piskarskas · Optics Express · 2011
We report on experimental and numerical investigation of two-photon coincidence properties of the parametric spontaneous down-converted field excited by a high brightness blue LED in bulk lithium iodate crystal. Ratio of up to 11.5% of coincidence, which cannot be attributed to classical coincidences, to single photon counts was recorded at the outputs of multimode fibers, demonstrating well-preserved biphoton property. This result, combined with practically useful power of the source, suggests its possible application for a class of quantum experiments.