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Quantum efficiency measurement of single photon detectors using photon pairs generated in optical fibers

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arxiv 1007.1866 v3 pith:KK5UHVWK submitted 2010-07-12 quant-ph

Xiaoying Li , Xiaoxin Ma , Limei Quan , Lei Yang , Liang Cui , Xueshi Guo This is my paper
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keywords photonefficiencypairsquantumsinglecollectiondetectorgenerated
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Using the correlated signal and idler photon pairs generated in a dispersion shifted fiber by a pulsed pump, we measure the quantum efficiency of a InGaAs/InP avalanche photodiode-based single photon detector. Since the collection efficiency of photon pairs is a key parameter to correctly deduce the quantum efficiency, we carefully characterize the collection efficiency by studying correlation dependence of photon pairs upon the spectra of pump, signal and idler photons. This study allows us to obtain quantum efficiency of the single photon detector by using photon pairs with various kinds of bandwidths.

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