微弱光探测器光谱响应测量装置

doi:10.3969/j.issn.1000-1158.2024.08.01

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Abstract To meet the spectral responsivity calibration requirements of photon counting detectors, a low light level spectral responsivity measurement system is established. The feature of this system is that it can achieve spectral comparison measurement at pW monochromatic light power level. An adjustable luminance source is designed, and it is tightly coupled with the dispersion subtractive double grating monochromator to achieve power variable monochromatic light output with six orders, which can be applied to the linear working range of different photon detectors, covering the wavelength range 330～1100nm. The light-tight designation of the light path enables the system to work under normal lighting conditions, reducing the experimental environment requirements. Based on a standard detector integrated with fA grade current amplifier, the spectral responsivity measurement of the photon detectors at 1×10⁶photons/s count rate level is achieved. The controlling and data acquisition software are developed using LabView platform, which realizes the whole process of measurement automation. The characteristics experiment of the system has been carried out, and the relative spectral responsivity of photon detector are calibrated in the wavelength range from 330～1100nm with relative expanded uncertainty is (2.5～3.8)%, k=2.

Key words： optical measurement spectral responsivity spectral comparison low light level measurement photon counting uncertainty

Received: 04 February 2024 Published: 05 September 2024

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TB96

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	Articles by authors
	Lü Liang
	LUO Yupeng
	JIANG Xiaomei
	LIN Xiaofeng
	PANG Bowen

Cite this article:

Lü Liang,LUO Yupeng,JIANG Xiaomei, et al. Low Light Level Spectral Responsivity Measurement System[J]. Acta Metrologica Sinica, 2024, 45(8): 1089-1095.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2024.08.01 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2024/V45/I8/1089

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