A Simple Method for Accurate Wavenumber Determination in High-resolution CARS Spectroscopy

Authors: Fietz, H.; Beckmann, A.; Hohenberger, H.P.; Kiefer, W.

Source: Applied Spectroscopy, Volume 35, Issue 6, Pages 525-611 (November/December 1981) , pp. 609-611(3)

Publisher: Society for Applied Spectroscopy

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Abstract:

As is well known, in coherent anti-Stokes Raman spectroscopy (CARS), the frequency ω_R of molecular vibrations or rotations is determined by the difference in frequency of the applied laser beams with fixed (ω₁) and with tunable frequency (ω₂), i.e., ω_R = ω₁ − ω₂. For low resolution CARS experiments (∼0.1 to 1 cm⁻¹), it is usually sufficient to measure the frequencies of the two laser beams by means of a spectrometer which has been calibrated before using emission lines of discharge lamps. The accuracy in frequency determination applying this method is limited to be approximately ±0.1 to ±0.5 cm⁻¹.

Keywords: Raman spectroscopy; CARS spectroscopy; Fluorescence spectroscopy; Dye lasers; Techniques, spectroscopic

Document Type: Research article

DOI: http://dx.doi.org/10.1366/0003702814732157

Affiliations: 1: Physikalisches Institut, Universität Bayreuth, D-8580 Bayreuth, Federal Republic of Germany

Publication date: 1981-11-01

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