A Precise High Count-Rate FPGA Based Multi-Channel Coincidence Counting System for Quantum Photonics Applications
A Precise High Count-Rate FPGA Based Multi-Channel Coincidence Counting System for Quantum Photonics Applications
复制标题
DOI：
10.1109/jphot.2020.2968724
复制
发表时间：
2020-04
影响因子：
2.4
通讯作者：
E. Arabul;S. Paesani;S. Tancock;J. Rarity;N. Dahnoun
中科院分区：
文献类型：
--
作者：
E. Arabul;S. Paesani;S. Tancock;J. Rarity;N. Dahnoun
符合计数器在几乎每一个量子光子学设置中都起着从背景噪声中选通事件的作用。由于量子光子学实验复杂性的增加，精确的多通道和高计数率的符合计数工具已经变得合乎需要。然而，时序分析仪正在努力满足这些需求。我们提出了一种基于现场可编程门阵列（FPGA）的符合计数系统，该系统提供8个操作通道，8.9 ps均方根（RMS）分辨率（bin宽度为7.7 ps）和每秒3.2亿次计数（MCPS）的计数率（每个通道40 MCPS）。我们已经成功地在不同的量子光子学场景中测试了我们的设计，例如双光子干涉的检测和光相干态的伪光子数分辨检测，其中它已经显示出其在探测器饱和之外工作的能力。此外，我们还引入了一个双数据速率注册TDC，它通过使用两个时钟边沿来提高时间标记操作的线性度，而不会增加死区时间或过度使用空间。1.2最大DNL误差为LSB，最大INL误差为1.8 LSB，FWHM为10 ps，RMS分辨率为3.2 ps。
Coincidence counters play the role of gating events from the background noise in almost every quantum photonics setup. Precise multi-channel and high count-rate coincidence counting tools have become desirable due to an increase in the complexity of quantum photonics experiments. However, timing analyzers are struggling to meet these needs. We are proposing a Field Programmable Gate Array (FPGA) based coincidence counting system which provides 8 operational channels with 8.9 ps root mean square (RMS) resolution (with a bin width of 7.7 ps) and a count-rate of 320 million counts per second (MCPS) (with 40 MCPS per channel). We have successfully tested our design in different quantum photonics scenarios such as the detection of two-photon interference and pseudo-photon-number resolving detection of a coherent state of light where it has shown its capability of working beyond the saturation of detectors. Also, we have introduced a Dual Data Rate Registration TDC, which improved the linearity of the time tagging operation by using both clock edges without increasing the dead-time or using the space excessively. 1.2 LSB in max DNL error, 1.8 LSB in max INL error, 10 ps in FWHM and 3.2 ps in RMS resolution improvements were achieved.