High-speed low-noise single-photon detection system of ultrashort pulse gating

A single-photon detection and ultra-short pulse technology, which is applied in the direction of instruments, can solve the problems of reducing avalanche signal amplitude, limited operating frequency range, and destroying signal integrity, so as to expand operating frequency, reduce effective pulse width, and reduce errors. The effect of counting

Inactive Publication Date: 2017-08-11
UNIV OF SHANGHAI FOR SCI & TECH
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This method has a simple circuit, but while filtering the noise, it will also filter out the corresponding spectral components of the avalanche signal, which destroys the integrity of the signal. Multiple filtering not only reduces the amplitude of the avalanche signal, but also increases the time jitter. And because the pulse width corresponding

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  • High-speed low-noise single-photon detection system of ultrashort pulse gating
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  • High-speed low-noise single-photon detection system of ultrashort pulse gating

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[0021] In order to make it easy to understand the technical means, creative features, objectives and effects achieved by the present invention, the following embodiments will specifically illustrate the ultrashort pulse gated high-speed and low-noise single-photon detection system of the present invention in conjunction with the accompanying drawings.

[0022] figure 1 It is the principle block diagram of the ultrashort pulse gated high-speed and low-noise single-photon detection system in the embodiment of the present invention; and figure 2 It is a device structure diagram of an ultrashort pulse gated high-speed low-noise single-photon detection system in an embodiment of the present invention.

[0023] Such as figure 1 , 2 As shown, the ultrashort pulse gated high-speed low-noise single-photon detection system 100 includes a gate pulse signal generator 10, a single-photon generator 20, a capacitive balance circuit 30, a low-pass filter circuit 40, and a signal processing circuit ...

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Abstract

The invention provides a high-speed low-noise single-photon detection system of ultrashort pulse gating, which is characterized by comprising a gate pulse signal generation device, a single-photon generation device, a capacitive balancing circuit, a low-pass filtering circuit, and a signal processing and displaying circuit. The gate pulse signal generation device is used for generating a gate pulse signal with adjustable amplitude and pulse width. The single-photon generation device is used for generating a single photon source. The capacitive balancing circuit is used for extracting initial avalanche signals. The low-pass filtering circuit is used for filtering the initial avalanche signals to obtain an effective avalanche signal. The signal processing and displaying circuit is connected with the low-pass filtering circuit and is used for processing the effectively avalanche signal and displaying the effective avalanche count. The high-speed low-noise single-photon detection system of ultrashort pulse gating uses pulse width and amplitude-adjustable ultrashort pulse signals as gated signals, which not only extends the operating frequency of the single photon detector, but also reduces the effective pulse width of the gate signal and effectively reduces the error count, so as to ensure the high suppression ratio of the spike noise in the high speed detection and improve the performance of the detector.

Description

technical field [0001] The invention relates to the field of high-speed quantum detection, in particular to a high-speed and low-noise single-photon detection system controlled by ultrashort pulse gate. Background technique [0002] In recent years, with the rapid and steady development of quantum mechanics and information science, it has led to the birth of a new interdisciplinary subject—quantum information science. The opportunities and challenges brought by its development to classical information science have attracted widespread attention in the fields of physics and information science. . At present, single photon is widely used as the carrier of quantum information in the research of quantum information science, so single photon detection technology plays a vital role. As an effective detection device for photons in the near-infrared communication band, single-photon detectors based on InGaAs / InP avalanche photodiodes (APDs) not only have the advantages of small siz...

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Application Information

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IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 黄梓楠喻敏梁焰曾和平
Owner UNIV OF SHANGHAI FOR SCI & TECH
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