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Gated superconducting single photon detection device and method

A single-photon detection and single-photon detector technology is applied in the field of weak light detection to achieve the effects of improving stability, reducing error rate and improving anti-interference ability.

Active Publication Date: 2021-06-22
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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Problems solved by technology

[0004] Therefore, the present invention provides a gated superconducting single-photon detection device and method, which can effectively solve the problem of high-efficiency gated single-photon signal detection, and greatly reduce the influence of noise photons outside the gate on useful photon detection.

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  • Gated superconducting single photon detection device and method

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[0020] In order to make the purpose, technical solution and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and technical solutions.

[0021] Gated single-photon signal: Single-photon is usually produced by light through continuous attenuation. In many fields that require single-photon detection, single-photon signals are usually time-sequenced. On the one hand, it is convenient for photon generation and control (such as modulation and demodulation) tone, etc.) and processing, on the other hand, it can also effectively distinguish signal photons and noise photons in timing. Visually speaking, this kind of single-photon signal with regular timing is like needing to pass through a gate on timing, and only when the gate is opened will a single photon appear, so the single-photon signal with regular timing is called a gated single-photon signal. Supercon...

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Abstract

The invention belongs to the technical field of weak light detection, and particularly relates to a gated superconducting single-photon detection device and method, and the device comprises a superconducting nanowire single-photon detector used for detecting a single-photon signal, and a bias device used for current bias of the superconducting nanowire single-photon detector, the bias device comprises a direct-current bias current module used for generating a direct-current bias current signal and a gated bias current module used for generating a gated bias current signal through an external trigger signal, and the gated bias current signal is superposed on the direct-current bias current signal. The superconducting nanowire is biased under gating current, so that the superconducting nanowire single-photon detector alternately works in a detection state and a single-photon insensitive state, and then gating single-photon detection is achieved. According to the invention, the problem of high-efficiency gating single photon signal detection is effectively solved, the influence of noise photons outside a door on useful photon detection is greatly reduced, and the practicability is high.

Description

technical field [0001] The invention belongs to the technical field of weak light detection, and in particular relates to a gated superconducting single photon detection device and method. Background technique [0002] In modern sciences such as quantum information, astronomical photometry, atmospheric pollution measurement, precision analysis, high-speed phenomenon detection, molecular biology, ultra-high resolution spectroscopy, nonlinear optics, high-energy physics, non-destructive material analysis, optical time-domain reflectometry, etc. In the field of technology, one of the core scientific problems is the detection of extremely weak light signals, so single photon detectors (SPDs) are crucial in these fields. At present, there are many implementation schemes of SPD. Among them, photomultiplier tube (PMT) and silicon avalanche photodiode (Si-APD) mainly work in the visible light band. Their development is relatively mature, but their detection efficiency and repetition...

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Application Information

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IPC IPC(8): G01J11/00
CPCG01J11/00Y02P70/50
Inventor 江木生鲍皖苏汪洋周淳汪翔张海龙李家骥刘帆
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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