van den Berg Steven, Dekker Paul, Otter Gerard, Páscoa Marcela Pelica, Dijkhuizen Niels
Appl Opt. 2021 Mar 1;60(7):1995-2002. doi: 10.1364/AO.417467.
We have developed an SI-traceable narrow-band tunable radiance source based on an optical parametric oscillator (OPO) and an integrating sphere for the calibration of spectroradiometers. The source is calibrated with a reference detector over the ultraviolet/visible spectral range with an uncertainty of <1. As a case study, a CubeSat spectroradiometer has been calibrated for radiance over its operating range from 370 nm to 480 nm. To validate the results, the instrument has also been calibrated with a traditional setup based on a diffuser and an FEL lamp. Both routes show good agreement within the combined measurement uncertainty. The OPO-based approach could be an interesting alternative to the traditional method, not only because of reduced measurement uncertainty, but also because it directly allows for wavelength calibration and characterization of the instrumental spectral response function and stray light effects, which could reduce calibration time and cost.
我们基于光学参量振荡器（OPO）和积分球开发了一种具有国际单位制（SI）可溯源性的窄带可调谐辐射源，用于光谱辐射计的校准。该源通过参考探测器在紫外/可见光谱范围内进行校准，不确定度小于1。作为一个案例研究，一台立方星光谱辐射计已在其370纳米至480纳米的工作范围内进行了辐射校准。为了验证结果，该仪器还使用基于漫射器和自由电子激光（FEL）灯的传统装置进行了校准。在综合测量不确定度范围内，两种方法的结果显示出良好的一致性。基于OPO的方法可能是传统方法的一个有趣替代方案，这不仅是因为测量不确定度降低了，还因为它直接允许进行波长校准以及仪器光谱响应函数和杂散光效应的表征，这可以减少校准时间和成本。
