Efficient generation of tunable photon pairs at 0.8 and 1.6 micrometer

Abstract

We demonstrate efficient generation of collinearly propagating, highly nondegenerate photon pairs in a periodically-poled lithium niobate cw parametric downconverter with an inferred pair generation rate of 1.4*10^7/s/mW of pump power. Detection of an 800-nm signal photon triggers a thermoelectrically-cooled 20%-efficient InGaAs avalanche photodiode for the detection of the 1600-nm conjugate idler photon. Using single-mode fibers as spatial mode filters, we obtain a signal-conditioned idler-detection probability of about 3.1%.

arXiv comment8 pages, 3 figures

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• Theory and experiment of entanglement in a quasi-phase-matched two-crystal source
• Highly efficient generation of pulsed photon pair using a bulk Periodically Poled Potassium Titanyl Phosphate
• Steps towards the experimental realization of surface plasmon polariton enhanced spontaneous parametric down-conversion
• Entangling successive single-photons from quantum dots