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Nonlinear calibration system and method of photoelectric detector

A photoelectric detector and calibration system technology, applied in the direction of instruments, etc., can solve the problems of leakage meter and low detection accuracy in nonlinear areas, achieve good linear characteristics, simple and fast implementation, and high-precision calibration

Active Publication Date: 2017-12-22
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

In addition, the counting system also has dead time, which will also cause corresponding missing counts.
[0006] From the above description, it can be seen that in various photodetectors, they all face the problem of low detection accuracy in the nonlinear region.

Method used

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  • Nonlinear calibration system and method of photoelectric detector
  • Nonlinear calibration system and method of photoelectric detector
  • Nonlinear calibration system and method of photoelectric detector

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0045] Factors such as pulse accumulation and counting system dead time will cause nonlinear response problems of photodetectors. In order to ensure the detection accuracy of the photodetector in a large dynamic range, it needs to be calibrated frequently. The traditional calibration methods include the inverse square law of illuminance and the beam splitting comparison method.

[0046]The inverse square law of illuminance changes the light intensity received...

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Abstract

The present invention discloses a nonlinear calibration system and method of a photoelectric detector. The nonlinear calibration system comprises a transmission-reception separating device comprising a light source port, a reception port and a detection port; a light source device connected with the light source port; a reception light path connected with the reception port; and a detection light path connected with the detection port; The detection light path comprises the photoelectric detector, the light source device generates the signal light, and the transmission-reception separating device emits at least part of the signal light via the reception port, receives the echo signals returned by the emergent signal light at different distances via the reception port, and outputs the echo signals via the detection port. The detection light path obtains the echo signals via the photoelectric detector and records the echo signals, the echo signals are used to calculate the calibration factors of the photoelectric detector, and the nonlinear calibration is carried out on the photoelectric detector via the calibration factors. According to the technical scheme of the present invention, the nonlinear response of the photoelectric detector can be calibrated rapidly and conveniently and at high precision.

Description

technical field [0001] The invention relates to the technical field of photodetector calibration, and more specifically, to a non-linear calibration system and method for photodetectors. Background technique [0002] Photodetectors have a wide range of applications in quantum communication, radiation detection, lidar remote sensing and many other fields. At present, the commonly used photodetectors mainly include avalanche photodiode single-photon detectors, photomultiplier tube single-photon detectors, up-conversion single-photon detectors, and superconducting single-photon detectors. In practical use, photodetectors are faced with the problem of nonlinear response. [0003] When single-photon detectors operate in the linear range, the output is proportional to the input. The nonlinear response of the detector means that when the linear working range of the detector is exceeded, the output is no longer proportional to the input, and the greater the output, the greater the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D18/00
Inventor 王冲魏天问上官明佳裘家伟夏海云窦贤康
Owner UNIV OF SCI & TECH OF CHINA
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