1207.3902 (Taro Yamashita et al.)

Crosstalk-free operation of multi-element SSPD array integrated with SFQ
circuit in a 0.1 Watt GM cryocooler    [PDF]

Taro Yamashita, Shigehito Miki, Hirotaka Terai, Kazumasa Makise, Zhen Wang

We demonstrate the successful operation of a multi-element superconducting nanowire single-photon detector (SSPD) array integrated with a single-flux-quantum (SFQ) readout circuit in a compact 0.1 W Gifford-McMahon cryocooler. A time-resolved readout technique, where output signals from each element enter the SFQ readout circuit with finite time intervals, revealed crosstalk-free operation of the four-element SSPD array connected with the SFQ readout circuit. The timing jitter and the system detection efficiency were measured to be 50 ps and 11.4%, respectively, which were comparable to the performance of practical single-pixel SSPD systems.

View original: http://arxiv.org/abs/1207.3902