A wide-spectrum tunable standard single-photon source generating device and optical radiation calibration method
A single photon source and generating device technology, applied in the field of optical radiation measurement
Active Publication Date: 2021-05-28
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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[0006] In order to overcome the shortcomings of the related photon generation technology and coincidence measurement technology based on the parametric down-conversion process in the related photon wavelength range and the complexity of the measurement process, the present invention provides a wide-spectrum tunable standard single photon source generation device And optical radiation calibration method, the device uses two pumping lights to pump two groups of nonlinear crystals respectively to generate tunable entangled photons covering a wide spectrum of 460nm to 2500nm, through periodic switching, temperature tuning and phase matching of nonlinear crystals The angle switching method realizes the collinear output of photons related to different wavelengths, and the output photons can be directly used for the calibration of the extremely weak optical radiation at any wavelength point in the wavelength range and the absolute spectral response test of the extremely weak optical radiation detector. Eliminate the tedious process of conforming to the measurement
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[0039] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
[0040] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
[0041] In the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with eac...
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The present invention proposes a wide-spectrum tunable standard single-photon source generating device and a method for calibrating optical radiation. Frequency doubled light generation device, 532nm main pumping light pumping PPLN crystal correlation photon generation device, 355nm auxiliary pumping light pumping BBO crystal correlation photon generation device, background light radiation suppression system, signal light and idler light splitting and filtering device , Signal light monitoring device and other parts. Two pumping lights are used to pump two groups of nonlinear crystals respectively, and crystal cycle switching, temperature tuning and phase matching angle switching are used to achieve collinear output of photons with different wavelengths from 460nm to 2500nm. After the relevant photon output, background radiation suppression and filtering are completed, an absolutely calibrated single photon detector is used to monitor one related photon, and the output photon flow rate of another related photon can be predicted in real time for optical radiation calibration.
Description
technical field [0001] The invention belongs to the technical field of optical radiation measurement, and in particular relates to a wide-spectrum tunable standard single photon source generating device and an optical radiation calibration method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Optical radiation metrology generally refers to the use of basic metrology techniques to directly or indirectly establish a relationship between the amount of optical radiation or photometric parameters to be measured and basic physical constants or physical quantities with low measurement uncertainty, so as to improve the level of reproducibility or measurement. Optical radiation references can generally be divided into two categories: standard sources and standard detectors. and self-calibrating silicon photodiodes as representative detector sta...
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IPC IPC(8): G01J1/08G01J1/02
CPCG01J1/0295G01J1/08
Inventor 庄新港史学舜刘长明刘红博张鹏举
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP