Open AccessPhoton coincidences in spontaneous parametric down-converted radiation excited by a blue LED in bulk LiIO_3 crystal
Author(s) -
Justinas Galinis,
Michał Karpiński,
G. Tamošauskas,
Krzysztof Dobek,
A. Piskarskas
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.010351
Subject(s) - spontaneous parametric down conversion , photon , optics , excited state , coincidence , crystal (programming language) , brightness , physics , parametric statistics , atomic physics , radiation , amplified spontaneous emission , blue laser , materials science , optoelectronics , laser , quantum , quantum entanglement , quantum mechanics , medicine , statistics , alternative medicine , mathematics , pathology , computer science , programming language
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.