Tunable diode laser measurement of water vapor line parameters in the 10- to 15-μm spectral region

The absorption line parameters including self- and nitrogen-broadening coefficients of 17 H₂O lines in the 10- to 15-μm spectral region have been measured using tunable diode laser techniques. Many of the H₂O lines are pure rotational lines, and their line-widths exhibit the expected general narrowing trend as the rotational quantum number increases.