A device and method for calibrating the detection efficiency of a single photon detector

A single-photon detector, detection efficiency technology, applied in photometry, measurement devices, photometry using electrical radiation detectors, etc., can solve the problems of high cost, little research and development, time-consuming, etc. effect of noise

Active Publication Date: 2018-10-12
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Synchrotron radiation sources are large-scale scientific devices, and their output optical power is calculated, but their cost is extremely high, their efficiency is low, and time-consuming. Universal use

Method used

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  • A device and method for calibrating the detection efficiency of a single photon detector
  • A device and method for calibrating the detection efficiency of a single photon detector
  • A device and method for calibrating the detection efficiency of a single photon detector

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Embodiment 1

[0025] like figure 1 As shown, the calibration device for the detection efficiency of the single photon detector in this embodiment includes an optical darkroom 101, a cooling type trap detector 102, a temperature controller 103, a switch integral amplifier 104, a precision translation stage 105, and a single photon detector 106; The cooling type trap detector 102, the switch integral amplifier 104, and the precision displacement stage 105 are arranged inside the optical darkroom 101; the temperature controller 103 is used to control the temperature of the cooling type trap detector 102; the switch integral The input end of the amplifier 104 is connected to the output end of the cooling type trap detector 102; the incident light enters the optical darkroom 101, and the precision displacement stage 105 controls and switches the cooling type trap detector 102 and the single photon detector 106 to cut into the incident light path respectively , to measure the luminous flux of the...

Embodiment 2

[0033] like figure 2As shown, on the basis of Embodiment 1, the switch integration amplifier 104 in this embodiment includes an input switch 201, a reset switch 202, an integration capacitor 203, and an operational amplifier 204. The non-inverting input terminal of the operational amplifier 204 is grounded, and the reverse The phase input terminal is connected to the current output terminal of the cooling type trap detector 102 through the input switch 201, and the reset switch 202 and the integrating capacitor 203 are arranged in parallel between the voltage output terminal and the inverting input terminal of the operational amplifier 204 .

[0034] The switching integration amplifier 104 in this embodiment has an adjustable gain multiple, and its gain multiple is calculated from the ratio of the integration time to the capacitance value of the integration capacitor 203 .

[0035] The operating principle of the switch integrating amplifier 104 in the present embodiment is a...

Embodiment 3

[0038] like image 3 As shown, on the basis of Embodiment 1 or 2, this embodiment provides a method for calibrating the detection efficiency of a single photon detector, including the following steps:

[0039] Step 1: The temperature controller 103 adjusts and controls the refrigerated trap detector 102 to a low temperature and constant temperature state; in a low temperature environment, the dark current generated by the refrigerated trap detector 102 can reach femtoampere fA level.

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Abstract

The invention relates to a single-photon detector, and specifically relates to a calibration device and method for the detection efficiency of a single-photon detector. Measurement can be directly performed on horizontal optical radiation of a single photon. The calibration device comprises an optical darkroom, a refrigeration type trap detector, a temperature controller, a switching integral amplifier and a precision displacement platform, and is characterized in that the absolute spectral response rate of the trap detector is traced back to an optical power reference-low temperature radiometer. The calibration device has extremely low dark noise, and can directly perform measurement on the luminous flux horizontally in the single photon, thereby realizing direct calibration for the detection efficiency of the single-photon detector.

Description

technical field [0001] The invention relates to a single photon detector, in particular to a calibration device and method for the detection efficiency of a single photon detector. Background technique [0002] The development of advanced detection technologies can often bring about major changes in scientific discovery. Single-photon detectors whose sensitivity reaches the quantum limit are not only suitable for the detection of extremely weak spectra, but also the key to quantum information research. With the continuous development of single photon counting technology, single photon detectors are widely used in quantum communication, astronomical photometry, ultra-high resolution spectroscopy, non-destructive material analysis and other fields. Thanks to the development of semiconductor technology, new single-photon detector principles and technologies continue to emerge. Researchers are constantly seeking breakthroughs in the performance indicators of single-photon detec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/44G01J1/04
CPCG01J1/0403G01J1/44G01J2001/442G01J2001/444G01J2001/446
Inventor 史学舜刘长明陈海东赵坤刘玉龙刘红博
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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