Quantum detector tomography of a time-multiplexed superconducting nanowire single-photon detector at telecom wavelengths

Superconducting nanowire single-photon detectors (SNSPDs) are widely used in telecom wavelength optical quantum information science applications. Quantum detector tomography allows the positive-operator-valued measure (POVM) of a single-photon detector to be determined. We use an all-fiber telecom w...

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Published inOptics express Vol. 21; no. 1; pp. 893 - 902
Main Authors Natarajan, Chandra M, Zhang, Lijian, Coldenstrodt-Ronge, Hendrik, Donati, Gaia, Dorenbos, Sander N, Zwiller, Val, Walmsley, Ian A, Hadfield, Robert H
Format Journal Article
LanguageEnglish
Published United States 14.01.2013
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Summary:Superconducting nanowire single-photon detectors (SNSPDs) are widely used in telecom wavelength optical quantum information science applications. Quantum detector tomography allows the positive-operator-valued measure (POVM) of a single-photon detector to be determined. We use an all-fiber telecom wavelength detector tomography test bed to measure detector characteristics with respect to photon flux and polarization, and hence determine the POVM. We study the SNSPD both as a binary detector and in an 8-bin, fiber based, Time-Multiplexed (TM) configuration at repetition rates up to 4 MHz. The corresponding POVMs provide an accurate picture of the photon number resolving capability of the TM-SNSPD.
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ISSN:1094-4087
1094-4087
DOI:10.1364/oe.21.000893