Revising the H₂ ¹⁶O line-shape parameters around 1.1 m based on the speed-dependent Nelkin-Ghatak profile and the Hartmann-Tran profile

Accurate spectroscopic data for H-2 O-16 in the 1.1 mu m region are particularly important for the study of Earth's atmosphere. The pure water vapor molecular spectra were measured based on direct laser absorption spectroscopy using a narrow line-width external cavity diode laser combined with a high-precision Fabry-Perot etalon. A total of 31 H-2 O-16 transitions were studied for the first time by using the speed-dependent Nelkin-Ghatak profile and the Hartmann-Tran profile. From an accurate line-shape analysis, we obtained the line intensities and the self-broadening coefficients, and they are compared with the available data reported in the HITRAN 2016 database and the HITRAN 2020 database. Finally, we obtained information on the influence of Dicke narrowing, as well as the correlations between Dicke narrowing and speed dependence, and of speed-dependent effects.