By using a spectrometer having as source a commercial etherostructure AlxGa1-xAs diode laser operating in "free-running mode", line shape parameters of some water vapor ro-vibrational overtones at 820-830 nm have been measured at room temperature. These weak absorption lines have been detected by using the wavelength modulation spectroscopy technique with second-harmonic detection. The broadening and shifting coefficients have been obtained by fitting the collected second-harmonic absorption features while varying the pressure of different foreign gases.
Water vapor overtones pressure line broadening and shifting measurements
Lucchesini A;Gozzini S;Gabbanini C
2000
Abstract
By using a spectrometer having as source a commercial etherostructure AlxGa1-xAs diode laser operating in "free-running mode", line shape parameters of some water vapor ro-vibrational overtones at 820-830 nm have been measured at room temperature. These weak absorption lines have been detected by using the wavelength modulation spectroscopy technique with second-harmonic detection. The broadening and shifting coefficients have been obtained by fitting the collected second-harmonic absorption features while varying the pressure of different foreign gases.File in questo prodotto:
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Descrizione: Reprint of Eur. Phys. J. D 8(2), 223 - 226 (2000)
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