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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 7 — Apr. 1, 2014
  • pp: 1869–1872

Counting rate enhancements in superconducting nanowire single-photon detectors with improved readout circuits

Qingyuan Zhao, Tao Jia, Min Gu, Chao Wan, Labao Zhang, Weiwei Xu, Lin Kang, Jian Chen, and Peiheng Wu  »View Author Affiliations

Optics Letters, Vol. 39, Issue 7, pp. 1869-1872 (2014)

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Counting rates of superconducting nanowire single-photon detectors are usually estimated at hundreds of MHz by their kinetic–inductive reset time. This maximum is also limited by capacitor coupling effects in conventional readout circuits. In this Letter, we design and demonstrate an improved readout circuit that reduces the reset time and removes circuit limits. The counting rate at the 3 dB compression point is increased by four times for a large active area detector. We also discuss nonlinear dependences of the counting rate on the incident continuous-wave optical power and give a numerical model to explain our observations.

© 2014 Optical Society of America

OCIS Codes
(030.5260) Coherence and statistical optics : Photon counting
(040.3060) Detectors : Infrared
(040.5160) Detectors : Photodetectors
(040.5570) Detectors : Quantum detectors

ToC Category:

Original Manuscript: November 29, 2013
Revised Manuscript: February 17, 2014
Manuscript Accepted: February 24, 2014
Published: March 21, 2014

Qingyuan Zhao, Tao Jia, Min Gu, Chao Wan, Labao Zhang, Weiwei Xu, Lin Kang, Jian Chen, and Peiheng Wu, "Counting rate enhancements in superconducting nanowire single-photon detectors with improved readout circuits," Opt. Lett. 39, 1869-1872 (2014)

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