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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 18 — Aug. 27, 2012
  • pp: 20115–20123

Low-jitter single flux quantum signal readout from superconducting single photon detector

Hirotaka Terai, Taro Yamashita, Shigehito Miki, Kazumasa Makise, and Zhen Wang  »View Author Affiliations


Optics Express, Vol. 20, Issue 18, pp. 20115-20123 (2012)
http://dx.doi.org/10.1364/OE.20.020115


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Abstract

We developed a single-flux-quantum (SFQ) readout technology for superconducting single-photon detectors (SSPDs) to achieve low-jitter signal readout. By optimizing circuit parameters of the SFQ readout circuit, the input current sensitivity was improved below 10 μA, which is smaller than a typical critical current of SSPD. The experiment using a pulse-pattern generator as an input pulse source revealed that the measured jitter of the SFQ readout circuit is well below the system jitter of our measurement setup for the input current level above 15 μA. The measured jitter of the SSPD connected to the SFQ readout circuit was 37 ps full width at half maximum (FWHM) for an SSPD bias current of around 18 μA, which is a significant improvement on 67 ps FWHM jitter observed in conventional readout without an SFQ readout circuit.

© 2012 OSA

OCIS Codes
(040.0040) Detectors : Detectors
(270.5570) Quantum optics : Quantum detectors

ToC Category:
Detectors

History
Original Manuscript: June 29, 2012
Revised Manuscript: August 10, 2012
Manuscript Accepted: August 15, 2012
Published: August 17, 2012

Citation
Hirotaka Terai, Taro Yamashita, Shigehito Miki, Kazumasa Makise, and Zhen Wang, "Low-jitter single flux quantum signal readout from superconducting single photon detector," Opt. Express 20, 20115-20123 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-18-20115


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