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A single photon counting system with multi-parameter configuration

A single-photon counting and multi-parameter technology, applied in the field of photoelectric detection, can solve problems such as limiting the practicality of single-photon technology systems, increasing the overall dark count rate of the system, and increasing noise

Active Publication Date: 2021-04-30
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing designs improve the performance of specific parameters of photon counting systems, however, this is achieved at the expense of other parameters
For example, using a multi-SPAD system with logical OR gates / logic AND-OR gates will increase the overall dark count rate of the system, resulting in increased noise; while using a multi-SPAD system with logical AND gates, the system detection efficiency will decrease
In addition, the existing design is fixed and unchangeable for the optimization of specific parameters of the system, and when the test environment changes, such as changes in the intensity of the incident light signal, changes in the intensity of ambient light, and changes in the distance of long distance measurement / sensing, the system needs Adjust different parameter characteristics to adapt to changes in the test environment
This makes existing designs limit the practicality of single-photon technology systems under different incident optical signals and test environments

Method used

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  • A single photon counting system with multi-parameter configuration
  • A single photon counting system with multi-parameter configuration
  • A single photon counting system with multi-parameter configuration

Examples

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Embodiment 1

[0027] figure 2 An embodiment is given when the multi-parameter configurable single photon counting system is used for the measurement of optical signal intensity. The 1×2 electrically controlled optical switch 201, the first transmission fiber 202, the second transmission fiber 203, the fiber splitter 204, the third transmission fiber 205, the fourth transmission fiber 206, the fiber combiner 207, the first single photon Detector 208, first readout circuit 209, second single photon detector 210, second readout circuit 211, two-input logic AND gate 212, two-input logic OR gate 213, mode switching and signal processing module 214, light source 215 And fiber coupler 216. When the system is working, the optical signal sent by the light source enters the input end (A port) of the 1×2 electronically controlled optical switch through the fiber coupler, and the 1×2 electronically controlled optical switch guides the input optical signal to the output under external electronic contr...

Embodiment 2

[0034] Figure 5 An example in which a multi-parameter configurable single photon counting system is used for time-correlated single photon counting is given. 1×2 electrically controlled optical switch 301, the first transmission fiber 302, the second transmission fiber 303, the fiber splitter 304, the third transmission fiber 305, the fourth transmission fiber 306, the fiber combiner 307, the first single photon Detector 308, first readout circuit 309, second single photon detector 310, second readout circuit 311, two-input logic AND gate 312, two-input logic OR gate 313, mode switching and signal processing module 314, light source 315 , a fiber coupler 316, a time-to-digital converter 317, and a PC-side data processing system 318. When the system is working, the light source sends a pulse light signal through the fiber coupler and enters the input port (A port) of the 1×2 electronically controlled optical switch. At the same time, the light source sends a synchronous pulse...

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Abstract

The invention provides a multi-parameter enhanced and configurable single photon counting system. Its characteristics are: it consists of 1×2 electrically controlled optical opening, first transmission fiber, second transmission fiber, fiber beam splitter, third transmission fiber, fourth transmission fiber, fiber combiner, first single photon detector , a first readout circuit, a second single photon detector, a second readout circuit, a logic AND gate, a logic OR gate, and a mode switching and signal processing module. The invention can be used for the measurement of extremely weak light, and can be widely used in the fields of lidar, DNA sequencing, quantum key distribution, medical imaging and the like.

Description

[0001] (1) Technical field [0002] The invention relates to a multi-parameter configuration single-photon counting system, which can be used for the measurement of extremely weak light in the fields of laser radar, DNA sequencing, quantum key distribution, and medical imaging, and belongs to the field of photoelectric detection technology. [0003] (2) Background technology [0004] Single photon counting technology has been widely used in low-light detection fields such as lidar, fluorescence lifetime imaging (FLIM), DNA sequencing and medical imaging. Single-photon avalanche diode (SPAD) has become a commonly used detector in photon counting systems due to its advantages of low bias voltage, high sensitivity, low cost, and CMOS process compatibility. To improve the performance characteristics of single-photon avalanche diode-based photon counting systems, researchers have proposed various solutions using logic processing methods. Such as: in the literature "Digital silicon ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 邓仕杰刘厚权滕传新邓洪昌陈明杨宏艳徐荣辉苑立波
Owner GUILIN UNIV OF ELECTRONIC TECH
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