High-detection-efficiency single-photon detection array with crosstalk suppression function and system

Abstract

The invention provides a high-detection-efficiency single-photon detection array with a crosstalk suppression function and a system. The high-detection-efficiency single-photon detection array is composed of a bias voltage source 1, a single-photon detector array 2, an active quenching circuit chip 3, a crosstalk identification and suppression circuit 4, a signal processing system 5 and a light source 6. The high-detection-efficiency single-photon detection array can be used for realizing high fill factor and low crosstalk of the single-photon detector array, and can be widely applied to the field of ultra-weak light detection such as laser radar, fluorescence lifetime imaging, positron emission tomography and medical imaging.

Description

[0001] (1) Technical field [0002] The invention relates to a single-photon detection array and system with high detection efficiency and crosstalk suppression function. The invention can be used in the fields of extremely weak light detection such as laser radar, fluorescence lifetime imaging, positron emission tomography, and medical imaging. It belongs to the technical field of photoelectric detection. [0003] (2) Background technology [0004] Traditional imaging technologies such as CMOS image sensors and CCD image sensors have been greatly limited in the detection of extremely weak light. The advantages of strong anti-interference ability and simple structure are widely used in extremely weak light imaging applications such as lidar, fluorescence lifetime detection, DNA sequencing, and medical imaging. [0005] The fill factor is an important parameter of the single photon avalanche photodiode array, and the fill factor (Fillfactor, FF) can be defined as: [0006] FF=...

AI Technical Summary

Problems solved by technology

2. By increasing the distance between the detectors in the array, or adding a high anti-dielectric film between the detectors, and increasing metal and oxide isolation between the detectors, although the crosstalk is weakened to a certain extent, the single Fill Factor of Photon Detector Arrays

3. The above invention cannot achieve high fill factor and low crosstalk of single photon avalanche photodiode array at the same time

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