Mid-Infrared Laser Applications in Spectroscopy

  • Tittel F
  • Richter D
  • Fried A
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Abstract

The vast majority of gaseous chemical substances exhibit fundamental
vibrational absorption bands in the mid-infrared spectral region
(≈ 2–25 µm), and the absorption of light by these
fundamental bands provides a nearly universal means for their detection.
A main feature of optical techniques is the non-intrusive in situ
detection capability for trace gases. The focus time period of this
chapter is the years 1996–2002 and we will discuss primarily
CW mid-infrared laser spectroscopy. We shall not attempt to review
the large number of diverse mid-infrared spectroscopic laser applications
published to date. The scope of this chapter is rather to discuss
recent developments of mid-infrared laser sources, with emphasis
on established and new spectroscopic techniques and their applications
for sensitive, selective, and quantitative trace gas detection. For
example, laboratory based spectroscopic studies and chemical kinetics,
which will also benefit from new laser source and technique developments,
will not be considered.

Author-supplied keywords

  • rotcooling

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Authors

  • Frank Tittel

  • Dirk Richter

  • Alan Fried

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