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Optics Express

Observation of spontaneous parametric down-conversion excited by high brightness blue LED

G. Tamošauskas, J. Galinis, A. Dubietis, A. Piskarskas

Published Feb 17, 2010• 12 citations
Publisher

Abstract

We report on what is to our knowledge the first observation of the parametric fluorescence in bulk nonlinear crystals excited by commercial high-brightness incoherent blue LED.
DOI
10.1364/oe.18.004310

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Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text G. Tamošauskas, J. Galinis, A. Dubietis, and A. Piskarskas, "Observation of Spontaneous Parametric Down-Conversion Excited by High-Brightness Blue LED," in Advanced Photonics & Renewable Energy, OSA Technical Digest (CD) (Optica Publishing Group, 2010), paper NThC5. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
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.
We report on the measurement of photon coincidence and photon number statistics of the spontaneous parametric down-converted radiation excited by incoherent pump. A high ratio of photon coincidences in case of multimode acquisition suggests that the present technique may find application in quantum experiments. Experimental and numerical simulation results confirmed that the coincidence ratio in a photon counting experiment is tightly coupled to the coherence of the pump beam. An experiment on verification of statistical properties of the down-converted radiation allowed us to evaluate the afterpulse generation probability of the photon counters.