Accurate multi-region wavelength calibration method for the spectrometer

Yanliang Qin; Hai Bi; Zhengqian Tu; Zixiang Di; Weihua Huang

doi:10.1117/12.3033886

5 July 2024 Accurate multi-region wavelength calibration method for the spectrometer

Yanliang Qin, Hai Bi, Zhengqian Tu, Zixiang Di, Weihua Huang

Proceedings Volume 13183, International Conference on Optoelectronic Information and Functional Materials (OIFM 2024); 1318306 (2024) https://doi.org/10.1117/12.3033886
Event: The 3rd International Conference on Optoelectronic Information and Functional Materials (OIFM 2024), 2024, Wuhan, China

Abstract

Wavelength calibration is a crucial step in the practical application of the spectrometer. The relationship between wavelength and pixel position on the detector can be determined through characteristic spectral calibration. To apply the spectrometer to multi-channel spectral detection and other applications, we propose a method of multi-regions characteristic spectral calibration on a self-developed spectrometer by introducing a multi-core optical fiber. Experiments are carried out on the self-developed spectrometer with a spectral band of 537 nm ~ 600 nm and a resolution of 0.07 nm. The wavelength and pixel position are accurately matched through third-order polynomial fitting, with a fitting error of ±0.002 nm, improving the precision of the spectrometer in multi-channel measurement applications. At the same time, the spectral nonlinearity of the fitted polynomial is analyzed, and the results show that the spectral nonlinearity is about ±0.6 nm. Additionally, characteristic peaks of each region are fitted to calculate the resolution of the spectrometer. The results indicate that the spectrometer has a resolution of approximately 0.07 nm.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yanliang Qin, Hai Bi, Zhengqian Tu, Zixiang Di, and Weihua Huang "Accurate multi-region wavelength calibration method for the spectrometer", Proc. SPIE 13183, International Conference on Optoelectronic Information and Functional Materials (OIFM 2024), 1318306 (5 July 2024); https://doi.org/10.1117/12.3033886

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