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High‐resolution coherent anti‐stokes Raman spectroscopy of ethane
Author(s) -
Bican T. H. S.,
Jonuscheit J.,
Lehner U.,
Schrötter H. W.
Publication year - 1995
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250260817
Subject(s) - raman spectroscopy , spectrometer , laser , argon , resolution (logic) , optics , analytical chemistry (journal) , ion , spectroscopy , calibration , spectral line , chemistry , tunable laser , materials science , physics , organic chemistry , chromatography , quantum mechanics , astronomy , artificial intelligence , computer science
A continuous‐wave CARS spectrometer was equipped with a new frequency‐stabilized argon ion ring laser and better stabilization for the tunable dye laser was introduced. Special quartz sample cells with Brewster angle windows were placed in the focal region of the argon ion ring laser. A new data acquisition system was installed which allows the simultaneous recording of CARS signals and calibration spectra and the subsequent evaluation of the data. An instrumental resolution of less than 0.001 cm −1 and a wavenumber accuracy of about ± 0.006 cm −1 were achieved. As an example of the performance of the spectrometer, the CARS spectrum of ethane was measured in the region of the CH vibrations at pressures between 95 and 1.9 kPa. The spectra were compared with the stimulated Raman spectrum published recently.