National Institute of Information and Communications Technology, 588-2, Iwaoka, Nishi-ku, Kobe, Hyogo 651-2492, Japan.
Opt Lett. 2012 Jul 15;37(14):2982-4. doi: 10.1364/OL.37.002982.
We demonstrate the successful operation of a multielement 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.
我们成功演示了一个集成单磁通量子 (SFQ) 读出电路的多单元超导纳米线单光子探测器 (SSPD) 阵列在一个紧凑的 0.1 W 吉福德-麦克马洪 (Gifford-McMahon) 低温冷却器中的运行。一种时间分辨读出技术，其中每个元件的输出信号以有限的时间间隔进入 SFQ 读出电路，揭示了与 SFQ 读出电路连接的四元件 SSPD 阵列的无串扰操作。测量得到的定时抖动和系统检测效率分别为 50 ps 和 11.4%，与实际单像素 SSPD 系统的性能相当。
