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- W1521870052 abstract "The wavelength range between 2 and 5 /spl mu/m is of main interest for molecular spectroscopy and environmental monitoring. The 2.2-2.3 /spl mu/m spectral region is a window for water vapor and CO/sub 2/ absorption while absorption lines of some atmospheric pollutants are very strong. One of the most sensitive techniques for selective gas analysis is tunable diode laser absorption spectroscopy (TDLAS). To reduce the cost and dimensions of the equipment, single frequency diode lasers and detectors operating in continuous wave (CW) regime at room temperature (RT) or above are required in this spectral range. In this contribution we summarize the results obtained in the development of 6.1 angstrom semiconductors diode lasers and their applications for trace gas detection. The laser structures were grown by molecular beam epitaxy on GaSb substrates. To estimate the spectral quality of the laser, emission mode maps of the lasers have been performed using a Fabry-Perot interferometer or directly absorption lines of gases of interest. We present some results on TDLAS of methane, carbon monoxide, carbon dioxide, and HF in trace concentrations, obtained with the GaSb diode lasers used in the CW regime at temperatures up to 800/spl deg/C." @default.
- W1521870052 created "2016-06-24" @default.
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- W1521870052 date "2003-11-21" @default.
- W1521870052 modified "2023-10-18" @default.
- W1521870052 title "GaSb-based lasers for gas monitoring" @default.
- W1521870052 doi "https://doi.org/10.1109/leos.2002.1159425" @default.
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