CN100510660C - Method for conducting light radiation scaling using relative photon - Google Patents
Method for conducting light radiation scaling using relative photon Download PDFInfo
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- CN100510660C CN100510660C CNB2006100969010A CN200610096901A CN100510660C CN 100510660 C CN100510660 C CN 100510660C CN B2006100969010 A CNB2006100969010 A CN B2006100969010A CN 200610096901 A CN200610096901 A CN 200610096901A CN 100510660 C CN100510660 C CN 100510660C
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Abstract
This invention discloses a method for carrying out scaling of ray radiation by relative photons, which applies homemade BBO crystals to prepare a 702.2nm degenerate relative photon source of high brightness to be received by a being scaled photon digital detector and a trigger photon digital detector, utilizes a particular parameter amplification method to locate optical path accurately to realizes the quantitative evaluation to quanta efficiency of photomultipliers and assesses the measurement uncertainty of 1.65% (k=2).
Description
Technical field
The invention belongs to the optical radiation measuring method, relate to a kind of applied research based on relative photon method measuring light electric explorer quantum efficiency.
Background technology
Two kinds of methods of the general employing of the calibration of light radiation sensor at present, be based upon respectively on calibrated radiation source and the standard detector, their something in common is: at first need to set up high-precision grade standard just, set up with the standard of different accuracy grade afterwards and transmit chain, until user sensor, in fact calibration is exactly the process that compares step by step.The standard transfer chain has guaranteed that the response of various sensors can be traceable to a common benchmark, but it has also limited effective raising of the engineering reproducibility and the precision of standard, the application and the workbench of light radiation sensor vary, often need to design different transfer chains, to satisfy from radiometer under water to the difference calibration requirement of satellite imagery spectrometer.This inevitably causes precision to reduce gradually with the increase of transmission link when increasing the calibration difficulty.The error of standards at different levels itself can be transmitted step by step, finally be accumulated on the user sensor, from the domestic and international research result, the standard transmittance process is one of effective bottleneck of limiting sensor precision, this shows particularly outstandingly at infrared band, for example the precision of the elementary spectrum spoke luminance standard of short-wave infrared (1-2.5 μ m) can reach 0.2%, but airborne sensor is difficult to be better than 5% in the precision of this wave band both at home and abroad.
The black matrix of temperature accuracy control is often used as elementary calibrated radiation source, and its absolute radiation degree can be determined according to Planck's law of radiation and international temperature scale.Low temperature radiometer be grow up over past ten years, the present the highest standard detector of precision, it utilizes electrical heating to substitute the measuring light thermal effect under extremely low temperature, realizes the absolute measurement of optical radiation.Because precision is higher, and combines with sensor on various platforms easily, obtained the promotion energetically that space remote sensing etc. is used department based on the calibrating method of detector, developed countries such as American and Britain, moral are all greatly developing the standard detector technology of each wave band.
The relative photon calibrating method provides fabulous means for the radiation calibration of realizing " no standard is transmitted ", and the Argon ion laser that the Migdall group of the U.S. and gondola Brida group utilize 351nm is pumping KDP crystal and LiIO respectively
3, produced as seen-far relative photon is right, the quantum efficiency of having calibrated photomultiplier and snowslide silicon photoelectric diode.Wherein, Migdall also contrasts result and conventional method, and difference is about 2%, has confirmed the feasibility of this method.
Summary of the invention
The purpose of this invention is to provide a kind of method of utilizing relative photon to carry out light radiation scaling, utilized novel bbo crystal as nonlinear medium, the uncertainty of measurement that quantum efficiency is calibrated is reduced to 1.65%.
Utilize relative photon to carry out the method for light radiation scaling, it is characterized in that producing 702.2nm laser by Verdi 18 diode laser pumped MBR 110 ti sapphire lasers, generate narrow linewidth through MBD 200 frequency multipliers again, the Ultra-Violet Laser of the 351.1nm of single-frequency, be placed on bbo crystal in the black box with the Ultra-Violet Laser pumping of 351.1nm, it is right that this crystal produces relative photon, become 8.4 ° with the pumping laser of 351.1nm respectively, wherein a branch of photon is through being received by target digital detector undetermined behind the diaphragm, another Shu Guangzi is through being received by the flip-flop number detector through behind the narrow band pass filter behind the diaphragm again, electric signal direct input time of the amplitude converter of target digital detector output undetermined, the signal that triggers detector output is input to time-to-amplitude converter through behind the chronotron, the electric signal of target digital detector undetermined and the output of flip-flop number detector is input to the binary channels counter simultaneously, to write down the photon velocity of two paths of signals respectively; Time-to-amplitude converter becomes range signal with the electrical signal conversion that arrives in the two-way different time, is transported to single channel analyzer and multichannel analyzer respectively.The single channel analyzer effect is to select the photon pulse of arrival synchronously, then the single channel analyzer output signal is transported in the counter, with the speed that meets of the two-way coherent signal that writes down actual arrival, coincidence counting speed and trigger port photon velocity ratio are the quantum efficiency of waiting to calibrate digital detector; The effect of multichannel analyzer is to be convenient to observe coherent signal.
Described digital detector and triggering detector all adopt photomultiplier.
Pump laser of the present invention adopts the ti sapphire laser system, it is made of jointly Verdi 18 diode lasers, MBR 110 ti sapphire lasers and MBD 200 frequency multipliers three big modules, produce the Ultra-Violet Laser of the 351.1nm of narrow linewidth, single-frequency, bbo crystal is that Fujian Inst. of Matter Structure, Chinese Academy of Sciences produces.Under the prerequisite that satisfies phase-matching condition and crystalline dispersion equation, the relative photon that has produced wavelength, energy, time correlation is right, utilizes these two relative photons we have been carried out the work of photodetector quantum efficiency radiation calibration.
Difficult in order to solve relative photon location, the problem that the interference of stray light influence is bigger, the employing of uniqueness of the present invention the parameter amplification method, search out our needed relative photon cleverly.
The present invention has calibrated the quantum efficiency of photomultiplier at the 702.2nm wave band, and adopt international criterion evaluation handbook-" the describing method guide of uncertainty in the measuring process " to draw the uncertainty of measurement of 1.65% (k=2), this also is domestic up to now best measurement level.
The present invention can qualitative assessment photon counting detector (as photomultiplier, avalanche diode etc.) quantum efficiency, in quantum communications, and medical diagnosis, bioluminescence, fields such as chemistry and material analysis are utilized in a large number; The experiment porch of qualitative assessment quantum efficiency can be provided for photon counter detector manufacturer.
Description of drawings
Fig. 1 is the index path of the absolute quantum efficiency measurement of photomultiplier of the present invention.
Fig. 2 is the electronics installation drawing of the absolute quantum efficiency measurement of photomultiplier of the present invention.
Embodiment
Referring to Fig. 1, Fig. 2.
Utilize relative photon to carry out the method for light radiation scaling, produce 702.2nm laser by Verdi 18 diode laser pumped MBR 110 ti sapphire lasers, generate narrow linewidth through MBD 200 frequency multipliers again, the Ultra-Violet Laser of the 351.1nm of single-frequency, be placed on bbo crystal in the aluminium black box with the Ultra-Violet Laser pumping of 351.1nm, it is right that this crystal produces relative photon, become 8.4 ° with 351.1nm laser respectively, wherein a branch of photon is through being received by target photomultiplier undetermined behind the diaphragm, another Shu Guangzi is through receiving by triggering photomultiplier behind the process narrow band pass filter behind the diaphragm again, electric signal direct input time of the amplitude converter of target photomultiplier output undetermined, the signal that triggers photomultiplier output is input to time-to-amplitude converter through behind the chronotron, target photomultiplier undetermined and the electric signal that triggers photomultiplier output are input to the binary channels counter simultaneously, to write down the photon velocity of two paths of signals respectively; Time-to-amplitude converter becomes range signal with the electrical signal conversion that arrives in the two-way different time, is transported to single channel analyzer and multichannel analyzer respectively.The single channel analyzer effect is to select the photon pulse of arrival synchronously, then the single channel analyzer output signal is transported in the counter, with the speed that meets of the two-way coherent signal that writes down actual arrival, coincidence counting speed and trigger port photon velocity ratio are the quantum efficiency of waiting to calibrate photomultiplier; The effect of multichannel analyzer is to be convenient to observe coherent signal.
Photomultiplier private mask cover adopts copper product (H62) to make, the fabulous interference that has prevented extraneous electromagnetic field and parasitic light, and the photomultiplier model is photomultiplier R2949.
Claims (2)
1, utilize relative photon to carry out the method for light radiation scaling, it is characterized in that producing 702.2nm laser by Verdi18 diode laser pumped MBR 110 ti sapphire lasers, generate narrow linewidth through MBD 200 frequency multipliers again, the Ultra-Violet Laser of the 351.1nm of single-frequency, be placed on bbo crystal in the black box with the Ultra-Violet Laser pumping of 351.1nm, it is right that this crystal produces relative photon, become 8.4 ° with the pumping laser of 351.1nm respectively, wherein a branch of photon is through being received by target digital detector undetermined behind the diaphragm, another Shu Guangzi is through receiving by triggering detector behind the process narrow band pass filter behind the diaphragm again, electric signal direct input time of the amplitude converter of target digital detector output undetermined, the signal that triggers detector output is input to time-to-amplitude converter through behind the chronotron, target digital detector undetermined and the electric signal that triggers detector output are input to the binary channels counter simultaneously, to write down the photon velocity of two paths of signals respectively; Time-to-amplitude converter becomes range signal with the electrical signal conversion that arrives in the two-way different time, is transported to single channel analyzer and multichannel analyzer respectively; The single channel analyzer effect is to select the photon pulse of arrival synchronously, then the single channel analyzer output signal is transported in another counter, with the speed that meets of the two-way coherent signal that writes down actual arrival, coincidence counting speed and trigger port photon velocity ratio are the quantum efficiency of waiting to calibrate digital detector; The effect of multichannel analyzer is to be convenient to observe coherent signal.
2, method according to claim 1 is characterized in that described target digital detector undetermined and triggering detector all adopt photomultiplier.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103076085B (en) * | 2012-12-31 | 2016-12-28 | 中国电子科技集团公司第四十一研究所 | A kind of method that broadband visible light and near-infrared radiation are measured simultaneously |
| CN105371958A (en) * | 2015-11-16 | 2016-03-02 | 中国科学院合肥物质科学研究院 | Method of calibrating quantum efficiency of infrared detector by using correlated photons |
| CN105466890B (en) * | 2015-11-20 | 2018-06-29 | 中国科学院南海海洋研究所 | A kind of volume scattering function section plotter spectral radiometric calibration system based on continuous light source |
| CN110501023A (en) * | 2018-05-16 | 2019-11-26 | 北京振兴计量测试研究所 | Quantum efficiency caliberating device for star sensor |
| CN110568749B (en) * | 2019-08-30 | 2021-04-09 | 华中师范大学 | Time-to-digital converter circuit, time-to-digital converter device, time-to-digital converter apparatus, and method of controlling time-to-digital converter device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4632550A (en) * | 1983-10-13 | 1986-12-30 | Horiba, Ltd. | Measuring method for a time resolved emission spectrum or a time resolved excitation spectrum |
| WO2006038683A1 (en) * | 2004-10-01 | 2006-04-13 | Japan Science And Technology Agency | High-luminance quantum correlation photon beam generator |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4632550A (en) * | 1983-10-13 | 1986-12-30 | Horiba, Ltd. | Measuring method for a time resolved emission spectrum or a time resolved excitation spectrum |
| WO2006038683A1 (en) * | 2004-10-01 | 2006-04-13 | Japan Science And Technology Agency | High-luminance quantum correlation photon beam generator |
Non-Patent Citations (2)
| Title |
|---|
| 可见－近红外（488～944nm）基于低温辐射计的高精度光辐射绝对定标研究. 李双，王骥，章骏平，吴浩宇，郑小兵.光学学报，第25卷第5期. 2005 * |
| 自发参量下转换的研究及其在光学计量上的应用. 李健军，郑小兵，冯瑜，盛建军.激光与光电子学进展，第42卷第7期. 2005 * |
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