title: Orthogonal sequencing multiplexer for superconducting nanowire single-photon detectors with RSFQ electronics readout circuit.
abstract: We propose an efficient multiplexing technique for superconducting nanowire single-photon detectors based on an orthogonal detector bias switching method enabling the extraction of the average count rate of a set of detectors by one readout line. We implemented a system prototype where the SNSPDs are connected to an integrated cryogenic readout and a pulse merger system based on rapid single flux quantum (RSFQ) electronics. We discuss the general scalability of this concept, analyze the environmental requirements which define the resolvability and the accuracy and demonstrate the feasibility of this approach with experimental results for a SNSPD array with four pixels.
authors.affiliation: Institut für Mikro- und Nanoelektronische Systeme, Karlsruher Institut für Technologie, Karlsruhe, Germany. matthias.hofherr@kit.edu
authors.forename: Matthias
authors.initials: M
authors.lastname: Hofherr
authors.forename: Olaf
authors.initials: O
authors.lastname: Wetzstein
authors.forename: Sonja
authors.initials: S
authors.lastname: Engert
authors.forename: Thomas
authors.initials: T
authors.lastname: Ortlepp
authors.forename: Benjamin
authors.initials: B
authors.lastname: Berg
authors.forename: Konstantin
authors.initials: K
authors.lastname: Ilin
authors.forename: Dagmar
authors.initials: D
authors.lastname: Henrich
authors.forename: Ronny
authors.initials: R
authors.lastname: Stolz
authors.forename: Hannes
authors.initials: H
authors.lastname: Toepfer
authors.forename: Hans-Georg
authors.initials: HG
authors.lastname: Meyer
authors.forename: Michael
authors.initials: M
authors.lastname: Siegel
mesh_terms: D003217:Conductometry / Q000295:instrumentation*; D004553:Electric Conductivity; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D010783:Photometry / Q000295:instrumentation*; D017785:Photons; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*