Abstract
By using a spectrometer having as source a commercial etherostructure Al x Ga1 − x As 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.
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Lucchesini, A., Gozzini, S. & Gabbanini, C. Water vapor overtones pressure line broadening and shifting measurements. Eur. Phys. J. D 8, 223–226 (2000). https://doi.org/10.1007/s10053-000-8807-z
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DOI: https://doi.org/10.1007/s10053-000-8807-z