The research of Raman spectra measurement system based on tiled-grating monochromator

Li-na Liu; Yin-chao Zhang; Si-ying Chen; He Chen; Pan Guo; Yuan Wang

doi:10.1117/12.2034934

19 September 2013 The research of Raman spectra measurement system based on tiled-grating monochromator

Li-na Liu, Yin-chao Zhang, Si-ying Chen, He Chen, Pan Guo, Yuan Wang

Proceedings Volume 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications; 89052D (2013) https://doi.org/10.1117/12.2034934
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

A set of Raman spectrum measurement system, essentially a Raman spectrometer, has been independently designed and accomplished by our research group. This system adopts tiled-grating structure, namely two 50mm × 50mm holographic gratings are tiled to form a big spectral grating. It not only improves the resolution but also reduces the cost. This article outlines the Raman spectroscopy system’s composition structure and performance parameters. Then corresponding resolutions of the instrument under different criterions are deduced through experiments and data fitting. The result shows that the system’s minimum resolution is up to 0.02nm, equivalent to 0.5cm^-1 wavenumber under Rayleigh criterion; and it will be up to 0.007nm, equivalent to 0.19cm^-1 wavenumber under Sparrow criterion. Then Raman spectra of CCl₄ and alcohol have been obtained by the spectrometer, which agreed with the standard spectrum respectively very well. Finally, we measured the spectra of the alcohol solutions with different concentrations and extracted the intensity of characteristic peaks from smoothed spectra. Linear fitting between intensity of characteristic peaks and alcohol solution concentrations has been made. And the linear correlation coefficient is 0.96.

Citation Download Citation

Li-na Liu, Yin-chao Zhang, Si-ying Chen, He Chen, Pan Guo, and Yuan Wang "The research of Raman spectra measurement system based on tiled-grating monochromator", Proc. SPIE 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications, 89052D (19 September 2013); https://doi.org/10.1117/12.2034934

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KEYWORDS

Raman spectroscopy

Spectroscopy

Light scattering

Carbon

Control systems

Monochromators

Helium neon lasers

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