Recording Raman Spectra Using a Dynamic Fourier Transform Spectrometer

We have developed a dynamic Fourier transform spectrometer for recording Raman spectra in the near-IR range (800–1100 nm). Stability and reliability of operation of the spectrometer is achieved by using corner reflectors in the design as mirrors in the main channel. In order to record a weak Raman s...

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Bibliographic Details
Published in:Journal of applied spectroscopy 2018-11, Vol.85 (5), p.923-930
Main Authors: Balashov, A. A., Golyak, Il. S., Golyak, Ig. S., Morozov, A. N., Nesteruk, I. N., Khorokhorin, A. I.
Format: Article
Language:English
Subjects:
Acetylsalicylic acid
Analysis
Analytical Chemistry
Aspirin
Atomic/Molecular Structure and Spectra
Benzene
Emission analysis
Emission spectra
Fourier transform spectrometers
Fourier transforms
Physics
Physics and Astronomy
Raman spectra
Raman spectroscopy
Recording
Reflectors
Salicylates
Sampling
Spectroscopy
Stilbene
White light
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Summary:We have developed a dynamic Fourier transform spectrometer for recording Raman spectra in the near-IR range (800–1100 nm). Stability and reliability of operation of the spectrometer is achieved by using corner reflectors in the design as mirrors in the main channel. In order to record a weak Raman signal, we set up a white light channel in the spectrometer which enables locking into the zero optical path difference when summing the interferograms over several scans. A reference channel with sampling frequency λ/4 lets us improve the sampling accuracy and the signal-to-noise ratio of the emission spectra. Using our spectrometer, we recorded the Raman spectra of test substances with known positions of the emission lines: 1,4-bis(5-phenyl-2-oxazolyl)benzene (POPOP, C 24 H 16 N 2 O 2 ), stilbene (C 14 H 12 ), acetylsalicylic acid (C 9 H 8 O 4 ). Comparison of the POPOP Raman spectra obtained on the dynamic Fourier transform spectrometer and a diffraction spectrometer for the same experimental conditions showed that they qualitatively matched, and the time required to record the spectrum on the dynamic Fourier transform spectrometer was 4 times shorter.
ISSN:0021-9037
1573-8647
DOI:10.1007/s10812-018-0740-3