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A single photon detection device and method capable of suppressing afterpulse

A single-photon detection and single-photon detector technology, which is applied in the field of optical communication, can solve the problems of increasing the cost of single-photon detectors and increasing the pulse probability

Active Publication Date: 2021-09-14
QUDOOR TECH INC
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the low temperature environment will increase the cost of the single photon detector, and will also increase the pulse probability after the single photon detector

Method used

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  • A single photon detection device and method capable of suppressing afterpulse
  • A single photon detection device and method capable of suppressing afterpulse
  • A single photon detection device and method capable of suppressing afterpulse

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Embodiment Construction

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] In the following detailed description, reference is made to the accompanying drawings which are included in the specification and which illustrate specific embodiments of the application and which are included in this application. In the drawings, like reference numerals describe substantially similar components in different views. Va...

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Abstract

The invention discloses a single photon detection device and method capable of suppressing afterpulse. The single-photon detection device capable of suppressing post-pulse of the present invention comprises a synchronous light detection unit, a phase-locked loop, a clock selection unit, a clock distribution unit, a first logic unit, a second logic unit, a single-photon detector, a coinciding control unit and a selection output unit. In the post-pulse suppression method of the present invention, the clock signal is recovered by the system with a period of T to form a detector gating signal with a period difference of T / 2 and a post-pulse release gating signal, and an avalanche occurs when the single photon detector detects a single photon and shuts down T / 2 after the gating, open the post-pulse release gate and release the post-pulse, so as to suppress the post-pulse and improve the detection efficiency of the single-photon detector.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a single photon detection device and method capable of suppressing afterpulse. Background technique [0002] Single-photon detectors are high-sensitivity detection devices for detecting weak light signals, and are widely used in quantum key distribution (QKD), optical fiber sensing, optical fiber communication, lidar, high-energy physics, semiconductor device characteristic analysis, and biological imaging. Among the existing single photon detectors, the avalanche photodiode (APD) is more commonly used, which has the characteristics of high detection efficiency, compact structure, high reliability and low energy consumption. [0003] Key performance parameters of an avalanche photodiode (APD) include detection efficiency, after-pulse probability, dark count probability, etc. The post-pulse refers to the avalanche caused by the previous avalanche after the avalanche...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 陈柳平范永胜万相奎王其兵
Owner QUDOOR TECH INC
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