Hearne Institute for Theoretical Physics, and Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
School of Computer Science and Engineering, Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Phys Rev Lett. 2019 Nov 15;123(20):203601. doi: 10.1103/PhysRevLett.123.203601.
We present a technique that improves the signal-to-noise-ratio (SNR) of range-finding, sensing, and other light-detection applications. The technique filters out low photon numbers using photon-number-resolving detectors. This technique has no classical analog and cannot be done with classical detectors. We investigate the properties of our technique and show under what conditions the scheme surpasses the classical SNR. Finally, we simulate the operation of a rangefinder, showing improvement with a low number of signal samplings and confirming the theory with a high number of signal samplings.
我们提出了一种提高测距、传感和其他光探测应用的信噪比（SNR）的技术。该技术使用光子计数探测器滤除低光子数。这项技术没有经典模拟，也不能用经典探测器来完成。我们研究了这项技术的性质，并展示了在什么条件下该方案超越了经典 SNR。最后，我们模拟了测距仪的操作，显示出在少量信号采样下的改进，并通过大量信号采样证实了该理论。
