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High sensitivity gas analysis by mid and near infrared diode lasers

A survey paper
: Werle, P.

VDI/VDE-Gesellschaft Meß- und Automatisierungstechnik -GMA-, Düsseldorf:
5th International Symposium on Gas Analysis by Tunable Diode Lasers 1998
Düsseldorf: VDI-Verlag, 1998 (VDI-Berichte 1366)
ISBN: 3-18-091366-5
S.1-16 : Ill., Lit.
International Symposium on Gas Analysis by Tunable Diode Lasers <5, 1998, Freiburg/Brsg.>
Fraunhofer IFU; 2002 in Helmholtz-Gesellschaft integriert

When first tunable diode lasers were developed in the mid-1960s they found immediate application as much needed tunable sources for high-resolution laser absorption spectroscopy commonly referred to as TDLAS (tunable diode laser absorption spectroscopy). Substantial improvements in sensitivity and detection speed have been achieved since then by applying high frequency modulation schemes and an increasing number of laser based gas monitoring applications has been reported. In this survey paper the main features and applications of tunable diode laser absorption spectroscopy will be reviewed and the main characteristics of the currently available semiconductor diode lasers in the near and mid infrared with respect to spectroscopic applications and sensitive detection techniques will be discussed.