EXPERIMENTAL STUDY OF LINE PARAMETERS OF H$_2$S AROUND 1.57$\mu m$ USING TELECOM DIODE LASER SPECTROSCOPY

O. N. Ulenikov, A. W. Liu, E. S. Bekhtereva, O. V. Gromova, L. Y. Hao, S. M. Hu, J. Mol. Spectrosc. 234, 270, (2005)Author Institution: Hefei National Laboratory for Physical Sciences at; Microscale, University of Science and Technology of China, Hefei; 230026, China.; Laboratoire de Physicochimie de l'Atmosph$\grave{e}$re, Universit$\acute{e}$ du littoral C$\hat{o}$te d'Opale; 189 AA$\nu$. Maurice Schumann, 59140 Dunkerque; France(chen@univ-littoral.fr)Line intensities, self- and air-broadened linewidths of hydrogen sulfide (H$_2$S) have been determined around 1.57 $\mu$m utilizing Voigt line profiles. The measurements were performed by means of direct absorption spectroscopy technique using a continuous-wave tunable telecom-grade external cavity diode laser (ECDL) associated with a White type multipass cell. This spectral region corresponds to an interesting transparency window of the atmosphere. Transitions reaching the 2$\nu_1$+$\nu_2$ and $\nu_1$+$\nu_2$+$\nu_3$ two upper vibrational states of H$_2$S bands were reported in our previous contribution}. The line parameter analysis of 29 strong well-isolated lines from these two bands is extension of our knowledge