Timing jitter characterization of the SFQ coincidence circuit by optically time-controlled signals from SSPDs

Miki, S., Miyajima, S., Yabuno, M., Yamashita, T., Yamamoto, T., Imoto, N., Ikuta, R., Kirkwood, R. A., Hadfield, R. H. and Terai, H. (2019) Timing jitter characterization of the SFQ coincidence circuit by optically time-controlled signals from SSPDs. IEEE Transactions on Applied Superconductivity, 29(5), 1302104. (doi:10.1109/TASC.2019.2906258)

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Abstract

We report on the timing jitter characterization of the superconducting single flux quantum (SFQ) coincidence circuit, which is an essential component of the superconducting coincidence photon counter. Two superconducting nanowire single photon detectors (SSPDs), each of which is irradiated with optically time-controlled photons, are connected to the SFQ coincidence circuit, and the timing jitter of the SFQ circuit is evaluated by changing the relative time delay between two input ports for the SFQ comparator unit. We successfully observe the transition curve of the probability of obtaining the signal from the SFQ coincidence circuit by sweeping photon arrival time to each SSPD and confirm that this curve shifts temporally upon changing the bias current to the Josephson transmission line (JTL) in the SFQ circuit. A systematic investigation reveals that the relation between time delay and the bias current to JTL can be estimated. The full width half maximum timing jitter of the SFQ circuit is 1.1 ps, which is sufficiently low so that it does not influence the entire timing jitter of the coincidence photon counter.

Item Type:Articles
Additional Information:This workwas supported in part by JSPS Grant-in-Aid for Scientific Research Grant JP16H02214 and JST CREST Grant JPMJCR1671.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hadfield, Professor Robert and Kirkwood, Robert Andrew
Authors: Miki, S., Miyajima, S., Yabuno, M., Yamashita, T., Yamamoto, T., Imoto, N., Ikuta, R., Kirkwood, R. A., Hadfield, R. H., and Terai, H.
Subjects:Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Transactions on Applied Superconductivity
Publisher:IEEE
ISSN:1051-8223
ISSN (Online):1558-2515
Published Online:27 March 2019
Copyright Holders:Copyright © 2019 IEEE
First Published:First published in IEEE Transactions on Applied Superconductivity 29(5):1302104
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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