Prof. Yinlin Yuan Profile

Prof. Yinlin Yuan

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Proceedings Article | 19 October 2023 Paper

High stability tungsten halogen lamp drive power supply design and testing

Haisong Chen, Haoyu Wu, Yinlin Yuan, Peng Zou

Proceedings Volume 12709, 127091R (2023) https://doi.org/10.1117/12.2684916

KEYWORDS: Power supplies, Light sources, Tungsten, Lamps, Halogens, Calibration, Resistors, Design and modelling, Circuit switching, Data conversion

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In the field of radiation calibration of micro-optical loads, the stability of the light source is a technical problem that researchers must solve, the stability of the light source determines the accuracy of the radiation calibration results, at the same time, the stability of the light source is determined by the stability of the driving power supply, so based on the driving requirements of the radiation calibration light source, a tungsten halogen lamp driving power supply with an output current stability better than one thousandth of a percent is designed as a tungsten halogen lamp light source The thesis first analyses the advantages and disadvantages of switching power supplies and linear power supplies, and selects the linear power supply as the power supply structure according to the requirements, and analyses the working principle of the linear power supply, and then designs the corresponding circuit structure based on the working principle; finally, the experimental platform is built for power supply experiments, and after testing, the experimental results show that the output current stability of the power supply reaches After testing, the experimental results show that the output current stability of the power supply reaches three ten thousandths, and the stability of the light source reaches one ten thousandth when driving a 5W tungsten halogen lamp, which can meet the requirements of the tungsten halogen lamp driving power supply index.

Proceedings Article | 24 May 2023 Paper

Low-noise Si transferring detector for correlated photon absolute source

Yue Li, Wenchao Zhai, Yinlin Yuan, Yadong Hu, Xiaobing Zheng

Proceedings Volume 12706, 127060O (2023) https://doi.org/10.1117/12.2682611

KEYWORDS: Photodiodes, Silicon, Dark current, Signal to noise ratio, Temperature control, Cryogenics, Calibration

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The space radiometric benchmark enables in-orbit traceable to SI system, calibrates in-orbit loads, improves data consistency across different space radiometric remote sensing missions, and facilitates long-term high-precision monitoring of global climate and environment. The transferring detector becomes an absolute power detector by quantum optical radiation measurement in the self-calibration mode, and is used to measure solar radiation in the observation mode. Si photodiode is used as transferring detector in the visible band, which requires high-precision radiometric detection at the photon level. Therefore, Si photodiode and its amplifying circuit need to have low noise. To expand the detection dynamic range of Si photodiode under low radiation condition, the noise sources of Si photodiode and its amplifier circuit are analyzed, and cooling of Si photodiode is proposed to reduce the noise. Vacuum cryogenic experiment was conducted to study the temperature characteristics of Si photodiode at 223K to 263K, and the temperature control design requirements were obtained. A sealed package Si photodiode based on two-stages TEC was developed, and a high-precision temperature control circuit with -40 °C ± 0.01 °C was designed. The shunt resistance of the cooled Si photodiode at -40°C was tested to be 8.5 TΩ, and the dark current was 1.2 fA. A wide dynamic range low-light-level irradiance source with adjustable radiation intensity is used to test the cooled Si photodiode with a low-noise transimpedance amplifier, the measurement signal-to-noise ratio was 1158 when the photocurrent was about 1pA.

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