High-resolution coherent anti-stokes Raman spectroscopy of ethane

✍ Scribed by T. H. S. Bican; J. Jonuscheit; U. Lehner; H. W. Schrötter

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 449 KB
• Volume: 26
• Category: Article
• ISSN: 0377-0486
• DOI: 10.1002/jrs.1250260817

✦ Synopsis

Abstract

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.