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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 49, Iss. 2 — Feb. 1, 1995
  • pp: 188–192

Combined Vibrational and Rotational CARS for Simultaneous Measurements of Temperature and Concentrations of Fuel, Oxygen, and Nitrogen

Per-Erik Bengtsson, Lars Martinsson, and Marcus Aldén

Applied Spectroscopy, Vol. 49, Issue 2, pp. 188-192 (1995)


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Abstract

Simultaneous measurements of temperature and relative concentrations of fuel, oxygen, and nitrogen using combined vibrational coherent anti-Stokes Raman Spectroscopy (CARS) and dual-broad-band rotational CARS have been demonstrated with the use of a Nd:YAG laser and a single dye laser. With the use of a double-folded BOXCARS phase-matching scheme, both the vibrational and the rotational CARS signals were generated in such a way that the signals were superimposed at the spectrograph. With an additional mirror arrangement inside the spectrograph, both signals were recorded simultaneously on a single diode-array detector. The accuracy of single-shot fuel concentration measurements has been investigated, and measurements in a methane/air diffusion flame have been demonstrated. The influence of systematic errors on measured concentrations is discussed.

Citation
Per-Erik Bengtsson, Lars Martinsson, and Marcus Aldén, "Combined Vibrational and Rotational CARS for Simultaneous Measurements of Temperature and Concentrations of Fuel, Oxygen, and Nitrogen," Appl. Spectrosc. 49, 188-192 (1995)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-49-2-188

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