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Wavelength calibration method for spectroradiometers with picometer uncertainties



Yuqin Zong


Accurate wavelength calibration of array spectroradiometers is critical to many applications. We developed a new method for calibration of array spectroradiometers' wavelength scales using a wavelength-tunable kilohertz-pulsed optical parametric oscillator (OPO) laser and achieved a wavelength uncertainty on the level of picometers; a reduction of approximately two orders of magnitude compared to those using traditional methods. This high-accuracy wavelength calibration method can also be used to determine a spectroradiometer's pixel-to-pixel wavelength interval with an uncertainty of a few picometers, which is the key to achieving small uncertainties when a detector-based method is used for spectral calibration of array spectroradiometers using tunable lasers. Using this calibration method can also significantly reduce the overall measurement uncertainties in various applications.
Proceedings Title
CIE 2017 Midterm Meeting
Conference Dates
October 20-28, 2017
Conference Location


Wavelength Calibration, Pixel-to-Pixel Wavelength Interval, Spectroradiometer, Spectrometer, Spectrophotometer.


Zong, Y. (2021), Wavelength calibration method for spectroradiometers with picometer uncertainties, CIE 2017 Midterm Meeting, Jeju, , [online], (Accessed April 13, 2024)
Created April 22, 2021, Updated May 3, 2021