Single photon pulse arrival time detecting device

A single-photon detection and time-of-arrival technology, which is applied in the direction of instruments, can solve the problems of different settings, solidified working modes, and small storage space, and achieve the effects of improving efficiency, shortening the development cycle, and large storage space

Active Publication Date: 2019-03-08
HEFEI UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

The single-photon pulse arrival time detection devices in the prior art are all realized based on ASIC. Although the measurement accuracy and stability of the single-photon pulse arrival time detection device based on ASIC design meet the above requirements, it has high cost and development cycle. The problem of long and small storage space, at the same time, its working mode is solidified, and different settings cannot be made according to specific needs

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Embodiment Construction

[0020] see figure 1 , in this embodiment, the single-photon pulse arrival time detection device signal acquisition circuit 1 , FPGA processing module 2 and storage module 3 .

[0021] figure 1 As shown, the signal acquisition circuit 1 has a single photon detection device 4 and a signal amplification circuit 5; After being amplified, it is converted into a digital pulse signal; the FPGA processing module 2 collects the digital pulse signal from the signal amplification circuit 5 to obtain the collected pulse signal, saves the arrival time data of the pulse signal in the storage module 3, and finally uploads it to the host computer.

[0022] In specific implementation, the corresponding settings also include:

[0023] The FPGA processing module 2 includes a serial-to-parallel module 6, and the serial-to-parallel module 6 is used to convert the acquisition pulse signal into a parallel signal, thereby reducing the operating frequency of the subsequent modules. For example, the ...

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Abstract

The invention discloses a single photon pulse arrival time detecting device. The device comprises a signal acquisition circuit, an FPGA processing module and a storage module. A single photon detecting device and a signal amplifying circuit convert an optical signal into a digital pulse signal which is collected by the FPGA processing module. In the acquisition of the single photon pulse signal, aserial-to-parallel conversion method is adopted to reduce the operating frequency of a data analysis module, the collected pulse data is analyzed by means of an assembly line, a multi-stage circuit simultaneously processes the data to achieve acquisition, analysis and storage, and the device greatly shortens the clock cycle required for the work, reduces the time taken for the entire process, andgreatly improves the efficiency.

Description

technical field [0001] The invention relates to a single-photon pulse arrival time detection device, which is a device for single-photon information detection in the quantum field. Background technique [0002] Photon is the smallest energy quantum of light. At present, high-resolution single-photon arrival time detection devices are widely used in the quantum field. In quantum experiments, it is often necessary to count single photons in segments to reflect the state of the experimental object, but segmental counting will lose part of the effective information, which requires precise measurement of the arrival time of each single photon, requiring picosecond-level Measurement accuracy, and the stability of the system is required to be better; in the experiment, it is often necessary to measure the flight time of the particle, and then combine the flight trajectory of the particle and other information to identify the type of the particle. To improve the measurement accuracy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 徐南阳施赛烽陈冰
Owner HEFEI UNIV OF TECH
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