DocumentCode :
1126117
Title :
Simultaneous Spectroscopy of NH3 and CO Using a > 50 nm Continuously Tunable MEMS-VCSEL
Author :
Kögel, Benjamin ; Halbritter, Hubert ; Jatta, Sandro ; Maute, Markus ; Böhm, Gerhard ; Amann, Markus-Christian ; Lackner, Maximilian ; Schwarzott, Michael ; Winter, Franz ; Meissner, Peter
Author_Institution :
Tech. Univ. Darmstadt, Darmstadt
Volume :
7
Issue :
11
fYear :
2007
Firstpage :
1483
Lastpage :
1489
Abstract :
A fiber-based remote measurement setup for tunable diode laser absorption spectroscopy, introducing an electrically pumped, micromechanical vertical-cavity surface-emitting laser with single-mode emission spectrum, narrow linewidth of 40 MHz, and broadband, continuous wavelength coverage of 51 nm around 1.55 mum is presented. The tunable laser spectrometer is employed for analysis of heterogeneous gas compositions and simultaneous detection of two species, ammonia and carbon monoxide, in a single continuous wavelength sweep. Broadband absorbance spectra are captured at elevated temperatures up to 300 degC revealing opposed temperature dependencies for selected transitions.
Keywords :
infrared spectroscopy; measurement by laser beam; micromechanical devices; semiconductor lasers; continuous wavelength coverage; fiber-based remote measurement setup; micromechanical vertical-cavity surface-emitting laser; simultaneous spectroscopy; single-mode emission spectrum; tunable diode laser absorption spectroscopy; Electric variables measurement; Fiber lasers; Gas lasers; Pump lasers; Spectroscopy; Surface emitting lasers; Temperature dependence; Tunable circuits and devices; Vertical cavity surface emitting lasers; Wavelength measurement; Absorption spectroscopy; ammonia $({rm NH}_{3})$; carbon monoxide (CO); microelectromechanical systems (MEMS); tunable laser; vertical-cavity surface-emitting laser (VCSEL);
fLanguage :
English
Journal_Title :
Sensors Journal, IEEE
Publisher :
ieee
ISSN :
1530-437X
Type :
jour
DOI :
10.1109/JSEN.2007.907055
Filename :
4305208
Link To Document :
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