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

A single-photon detection and single-photon detector technology, applied in the field of photoelectric detection, can solve the problems of reducing the fill factor of the single-photon detector array, unable to achieve high fill factor and low crosstalk of the single-photon avalanche photodiode array at the same time, etc.

Active Publication Date: 2020-12-25
GUILIN UNIV OF ELECTRONIC TECH
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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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  • High-detection-efficiency single-photon detection array with crosstalk suppression function and system
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  • High-detection-efficiency single-photon detection array with crosstalk suppression function and system

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[0031] The present invention will be further described below in conjunction with specific examples.

[0032] image 3 The embodiment of the single-photon detection array and system with high detection efficiency and crosstalk suppression function is given. It is composed of a bias voltage source 1, a 7×7 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.

[0033] In the embodiment, the outputs of all 49 single-photon avalanche photodiodes in the 7×7 single-photon detector array 2 are connected to the corresponding active quenching circuits in the active quenching circuit array 3 . The bias voltage source 1 outputs a controllable DC voltage to all the single photon avalanche photodiodes in the 7×7 single photon detector array 2 to provide them with the bias voltage required for the single photon working mode. Outputs of all single photon avalanche photodio...

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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=...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/44
CPCG01J1/44G01J2001/442
Inventor 邓仕杰李翔张文涛苑立波
Owner GUILIN UNIV OF ELECTRONIC TECH
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