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Infrared semiconductor lasers for sensing and diagnostics

Infrarot-Halbleiterlaser für die Sensorik und Diagnostik
: Wagner, J.; Mann, C.; Rattunde, M.; Weimann, G.


Applied physics. A 78 (2004), No.4, pp.505-512
ISSN: 0340-3793
ISSN: 0721-7250
ISSN: 0947-8396 (Print)
ISSN: 1432-0630 (Online)
Journal Article
Fraunhofer IAF ()
infrared; Infrarot; semiconductor; Halbleiter; diode laser; Diodenlaser; optical sensing; optische Sensorik; quantum cascade laser; Quantenkaskadenlaser

There is an increasing demand for spectrally agile compact solid-state lasers for spectroscopic sensing and diagnostics. This demand can be met by III-V semiconductor-based lasers employing various design concepts for the active region. These concepts include, apart from the classical type-I interband diode laser, the type-II W-laser and the unipolar quantum cascade laser. Representative device data will be presented for these three types of lasers in conjunction with a discussion of the relative merits of the different active-region concepts.