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A single photon detector system and control method

A single-photon detector and controller technology, which is applied in the field of quantum physics engineering applications, can solve problems such as unsuitable for application development, easy to generate errors, and complicated operations, so as to shorten the detection dead time, increase the output code rate, and not reduce the The effect of detection efficiency

Inactive Publication Date: 2021-05-21
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technical solution can achieve the effect of shortening the detection dead time, it is not suitable for application development due to the complicated operation and high cost to reduce the dead time by optimizing various parameters.

Method used

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  • A single photon detector system and control method
  • A single photon detector system and control method
  • A single photon detector system and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Image 6 It shows the structure diagram of the single photon detector system in which the detection dead time is shortened to 1 / 4 in Embodiment 1 of the present invention, as Image 6 As shown: the system may include: a 1×4 optical switch 1, a single photon detector group 2, a signal aggregation unit 3 and a controller 4;

[0088] The 1×4 optical switch 1, the single photon detector group 2 and the signal convergence unit 3 are sequentially connected;

[0089] The controller 4 is respectively connected to the 1×4 optical switch 1, the single photon detector group 2 and the signal convergence unit 3;

[0090] The 1×4 optical switch 1 is used to complete the serial / parallel conversion of optical signals; the single photon detector group 2 is used to convert parallel optical signals into parallel electrical signals;

[0091] The signal convergence unit 3 is used to complete parallel / serial conversion of electrical signals;

[0092] The controller 4 is used to control the ...

Embodiment 2

[0114] Figure 8 It shows the structure diagram of the single photon detector system whose detection dead time is shortened to one sixteenth in Embodiment 1 of the present invention, as Figure 8 As shown: the system may include: a 1×16 optical switch 1, a single photon detector group 2, a signal aggregation unit 3 and a controller 4;

[0115] The 1×16 optical switch 1, the single photon detector group 2 and the signal convergence unit 3 are sequentially connected;

[0116] The controller 4 is respectively connected to the 1×16 optical switch 1, the single photon detector group 2 and the signal convergence unit 3;

[0117] The 1×16 optical switch 1 is used to complete the serial / parallel conversion of optical signals; the single photon detector group 2 is used to convert parallel optical signals into parallel electrical signals;

[0118] The signal convergence unit 3 is used to complete parallel / serial conversion of electrical signals;

[0119] The controller 4 is used to c...

Embodiment 3

[0141] Figure 9 It shows the single photon detector system diagram in which the detection dead time of Embodiment 1 of the present invention is shortened to one sixty-fourth, as Figure 9 As shown, the system may include: a 1×64 optical switch 1, a single photon detector group 2, a signal aggregation unit 3 and a controller 4;

[0142] The 1×64 optical switch 1, the single photon detector group 2 and the signal convergence unit 3 are sequentially connected;

[0143] The controller 4 is respectively connected to the 1×64 optical switch 1, the single photon detector group 2 and the signal convergence unit 3;

[0144] The 1×64 optical switch 1 is used to complete the serial / parallel conversion of optical signals; the single photon detector group 2 is used to convert parallel optical signals into parallel electrical signals;

[0145] The signal convergence unit 3 is used to complete parallel / serial conversion of electrical signals;

[0146] The controller 4 is used to control ...

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Abstract

The present invention relates to a single photon detector system and a control method, which includes a sequentially connected 1×N optical switch, a single photon detector group, a signal convergence unit, and a controller connected thereto; through the 1×N optical switch, the The serial optical pulse signal with high code rate at the input end is converted into N parallel optical pulse signals with low code rate, and N single photon detector units with the same performance work in parallel to convert N parallel optical signals into N The parallel electrical signals are passed through the signal converging unit to realize parallel-to-serial conversion of the electrical signals and restore the output single-photon detection results to solve the problem of the single-photon detector dead time limitation, thereby increasing the maximum count rate of the single-photon detector system. The technical and economic limitations of high-speed single-photon detectors are overcome.

Description

technical field [0001] The invention relates to the application field of quantum physics engineering, in particular to a single photon detector system and a control method. Background technique [0002] Single photon detection technology (single photon detector / detection, SPD), as an optical signal measurement technology with extreme sensitivity, plays an irreplaceable role in the fields of quantum information technology, physics, chemistry, biology and astronomy, and has become an indispensable part of the field of quantum information. The core key technology that is lacking; single-photon detection devices are used to convert optical signals into electrical signals based on single photon detection. Since quantum information technology uses a single elementary particle to encode and manipulate information, it has extremely demanding performance on single-photon detectors. Requirements, such as detection efficiency, counting rate, dead time, etc., far exceed the performance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 苗浡瑞苗新
Owner STATE GRID CORP OF CHINA
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