论文标题
SNSPDS中的时间步行和抖动校正以高计数率
Time-walk and jitter correction in SNSPDs at high count rates
论文作者
论文摘要
超导纳米线单光子检测器（SNSPDS）是时间相关的单个光子计数的领先检测器类型，尤其是在近红外。当以高计数速率运行时，SNSPD表现出由内部设备属性和RF扩增链特征引起的计时抖动增加。 RF脉冲高度和形状的变化导致定时测量潜伏期的变化。为了补偿这一点，我们演示了一种校准方法，该方法将检测事件的延迟与脉冲之间的时间相关。通过应用校准过程得出的校正，可以在软件中以高率的高速增加抖动的增加。我们用单像素钨硅剂SNSPD演示了我们的方法，并证明它降低了高计数速率。该技术特别有效地去除以高计数速率出现在仪器响应函数中的长尾巴。以11.4 mcounts/s的计数速率，我们以最高水平（FW1％m）的全部宽度降低了45％。因此，该方法可以使某些量子通信协议（FW1％M）度量限制的某些量子通信协议几乎快速运行的两倍。 \ c {opyright} 2022。保留所有权利。
Superconducting nanowire single-photon detectors (SNSPDs) are a leading detector type for time correlated single photon counting, especially in the near-infrared. When operated at high count rates, SNSPDs exhibit increased timing jitter caused by internal device properties and features of the RF amplification chain. Variations in RF pulse height and shape lead to variations in the latency of timing measurements. To compensate for this, we demonstrate a calibration method that correlates delays in detection events with the time elapsed between pulses. The increase in jitter at high rates can be largely canceled in software by applying corrections derived from the calibration process. We demonstrate our method with a single-pixel tungsten silicide SNSPD and show it decreases high count rate jitter. The technique is especially effective at removing a long tail that appears in the instrument response function at high count rates. At a count rate of 11.4 MCounts/s we reduce the full width at one percent maximum level (FW1%M) by 45%. The method therefore enables certain quantum communication protocols that are rate-limited by the (FW1%M) metric to operate almost twice as fast. \c{opyright} 2022. All rights reserved.
