PACS. 33.70.Jg Line and band widths, shapes, and shifts - 33.20.Ea Infrared spectra - 07.57.Ty Infrared spectrometers, auxiliary equipment, and techniques
Springer Online Journal Archives 1860-2000
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.
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