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

Natarajan, C.M., Zhang, L., Coldenstrodt-Ronge, H., Donati, G., Dorenbos, S.N., Zwiller, V., Walmsley, I.A. and Hadfield, R. (2013) Quantum detector tomography of a time-multiplexed superconducting nanowire single-photon detector at telecom wavelengths. Optics Express, 21(1), pp. 893-902. (doi:10.1364/OE.21.000893)

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Abstract

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.

Item Type:Articles
Additional Information:This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.21.000893. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hadfield, Professor Robert
Authors: Natarajan, C.M., Zhang, L., Coldenstrodt-Ronge, H., Donati, G., Dorenbos, S.N., Zwiller, V., Walmsley, I.A., and Hadfield, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Optics Express
Publisher:Optical Society of America
ISSN:1094-4087
Published Online:09 January 2013
Copyright Holders:Copyright © 2013 Optical Society of America
First Published:First published in Optics Express 21(1):893-902
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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