A Frequency-nondegenerate Entanglement Source Using Periodically-poled Lithium Niobate
نویسندگان
چکیده
We demonstrate efficient generation of highly nondegenerate photon pairs with a type-I phase-matched, periodically-poled lithium niobate parametric downconverter. The signal photons at 800 nm and the idler photons at 1600 nm were generated in a collinear-propagation configuration with an inferred pair generation rate of 1.4×107/s/mW of pump power. Detection of a signal photon triggered 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, the signal-conditioned idler-detection probability was ∼3.1%.
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