Validate the parameters in HITRAN through the experiment of H2O based on direct absorption spectroscopy technology

High-resolution absorption measurements of H 2 O using direct absorption spectroscopy technology were made to acquire the spectroscopic parameters of High Resolution Transmission Molecular Absorption Database (HITRAN database). The most important spectral parameters frequently used in the researchers and study, was calculated from the integrated absorbance area of H 2 O at the different temperature from 296K to 923K of the spectrum near 1397nm based on the distributed feedback laser. From the result of experiment, the calculated spectral parameters was compared with the literature values from HITRAN database. The method and results of the measurement obtained from this paper are expected to be helpful in the supply of the sufficient accuracy spectral parameters in the practical measurement.