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Efficient generation of tunable photon pairs at 0.8 and 1.6 micrometer

Elliott J. Mason, Marius A. Albota, Friedrich Koenig, Franco N. C. Wong

quant-pharXiv:quant-ph/0207156

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*107/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%.

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