Fabricating a Raman spectrometer using an optical pickup unit and pulsed power.

Scientific Reports
Young Chai Cho, Sung Il Ahn

Abstract

Although Raman spectroscopy is a major analytical tool in modern chemical experiments, commercial Raman spectrometers remain very pricey for educational and research purposes in individual university laboratories. Thus, this study focused on the structural similarity between the Raman spectrometer and an optical pickup unit (OPU), which is an inexpensive compact optical device used for a part of optical discs. The study investigated whether or not a full set of Raman spectrometer can be developed at a cost of less than 1,000 US$. The OPU-based Raman spectrometer was fabricated using 3D printer-made components, a Raman edge filter, and a laser diode with a wavelength of 520 nm as the light source. A function generator was used as a pulsed power source to analyze the characteristics of the OPU Raman spectrometer according to various frequencies and duty ratios. When using a pulsed DC power supply, the laser wavelength tended to move to a longer wavelength with increases in duty ratios. That is, the higher the frequency at the same duty ratio, the weaker the background light intensity compared with the scattered Raman signal intensity. The findings illustrate that Raman signal strength can be adjusted by adjusting the focal length...Continue Reading

References

Dec 6, 2011·Optics Letters·N IsmailM Pollnau
Dec 3, 2014·Biosensors & Bioelectronics·Marco DonolatoMikkel Fougt Hansen
Jul 13, 2016·Nature Communications·Thomas HümmerDavid Hunger
Jan 6, 2017·Physical Chemistry Chemical Physics : PCCP·Sergei A ChernyakValery V Lunin
Jan 24, 2018·Nature Communications·C FerranteT Scopigno
Jul 7, 2018·ACS Sensors·Edwin En-Te Hwu, Anja Boisen

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Citations

Mar 16, 2021·ACS Omega·Tamsyn StanboroughDeborah L Crittenden

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Software Mentioned

Magicplot
MagicPlot Student
FreeCAD

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