This paper presents the spectral responsivity calibrations of two indium gallium arsenide (InGaAs) and one germanium based near-infrared photovoltaic detectors using a wavelength tunable laser source based on a supercontinuum laser developed at the Metrology Research Institute, Aalto University. The setup consists of a supercontinuum laser based on a photonic crystal fiber as the light source, a laser line tunable filter, and coupling optics. These responsivity calibrations are performed against a pyroelectric radiometer over a wide spectral range of 800–2000 nm. Our wavelength tunable laser source has a high spectral power up to 2.5 mW with a narrow spectral full-width-at-half-maximum of 3 nm at a wavelength of 1100 nm. Despite the sharp spectral intensity variations, no artifacts are observed in the spectral responsivities of the detectors. Comparison of the spectral responsivities of the InGaAs detectors measured using the wavelength tunable laser and the earlier calibrations performed at the Metrology Research Institute in 2010 and 2016, shows that the higher spectral power of wavelength tunable light source decreases the expanded uncertainty from approximately 4% to 2.2–2.6% over the spectral range of 820–1600 nm. Temperature dependence of the spectral responsivities near the band gap edges are also measured and analysed.

中文翻译：

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使用波长可调光源校准近红外探测器

本文介绍了一种基于波长可调激光源的两种砷化铟镓（InGaAs）和一种锗基近红外光伏检测器的光谱响应度校准，该波长基于在阿尔托大学计量研究所开发的超连续谱激光器。该装置包括一个基于光子晶体光纤作为光源的超连续谱激光器，一个激光线可调滤波器和耦合光学器件。这些响应度校准是通过热释电辐射计在800-2000 nm的宽光谱范围内进行的。我们的波长可调激光源具有高达2.5 mW的高光谱功率，并且在1100 nm波长处的半光谱最大半峰全宽光谱窄。尽管光谱强度变化很大，但在检测器的光谱响应中没有观察到伪影。比较使用波长可调激光器测量的InGaAs探测器的光谱响应度和2010年和2016年在计量学研究所进行的较早校准，结果表明，波长可调光源的较高光谱功率将扩展不确定度从大约4％降低到了在820-1600 nm的光谱范围内为2.2-2.6％。还测量并分析了带隙边缘附近光谱响应的温度依赖性。在820–1600 nm光谱范围内为6％。还测量并分析了带隙边缘附近光谱响应度的温度依赖性。在820–1600 nm光谱范围内为6％。还测量并分析了带隙边缘附近光谱响应度的温度依赖性。