MCT探测器相对光谱响应度测量及漂移修正研究

doi:10.3969/j.issn.1000-1158.2025.02.02

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Abstract As a key component of photodetector， accurate measurement of the responsivity of MCT detector is very important to ensure the detection accuracy of the system. However， the detector responsivity will drift with temperature changes， material aging， and fluctuations in environmental conditions， affecting the reliability of the measurement results. Most of the existing research focuses on the wavelength response characteristics of MCT detectors， but the research on the drift problem is relatively weak. Using pyroelectric detector as the standard detector， the relative spectral responsivity measurement system of photodetector was built. The relative spectral responsivity of MCT detector in 3.5~5 μm was measured and compared with the existing results. The repeatability of the pyroelectric detector signal was measured experimentally by repeatedly switching the pyroelectric detector and MCT detector. The drift characteristics of MCT detector with time in a typical period of relative spectral responsivity measurement were studied， and a sequence cross measurement method was proposed to correct the quasi-linear drift effect. The relative standard deviation of the relative spectral responsivity measurement results of MCT detectors was reduced from 0.74% to 0.38%. The use of linear correction coefficients for correction is more suitable for measuring the relative spectral responsivity of fast MCT detectors.

Key words： optical metrology relative spectral responsivity MCT detector drift characteristic pyroelectric detector

Received: 25 October 2024 Published: 04 March 2025

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TB96

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	Articles by authors
	WANG Qiwen
	ZHAO Yunlong
	AN Baolin
	LU Xiaofeng
	Yang Chengzhi
	WANG Gao
	DONG Wei
	LI Yangjun

Cite this article:

WANG Qiwen,ZHAO Yunlong,AN Baolin, et al. Study on Relative Spectral Responsivity Measurement and Drift Correction of MCT Detector[J]. Acta Metrologica Sinica, 2025, 46(2): 160-166.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2025.02.02 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2025/V46/I2/160

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