Laser Absorption Spectroscopy of H₂O in the 12 252-12 312 cm^-1Region Using Herriott-Type Cell

Abstract

We study the absorption spectra of water vapor by the 899-29 Ti:sapphire laser in the region between 12 252-12 312 cm-1. Due to the weak absorption of H2O, a folded multi-pass optical path cell of Herriott-type is used to increase the sensitivity of detection. Totally, forty-three lines with intensity ranging around 10-24cm-1/molecule are recorded and the centre frequency of transitions is derived by fitting observed lines using Voigt profile.