Sub-Doppler spectroscopy of (H2O)-O-18 at 1.4 µm
Authors: Gagliardi G., Rusciano G., Gianfrani L.
Autors Affiliation: Ist. Naz. Per la Fis. della Materia, Dipto. di Sci. Fisiche dell
Abstract: We performed saturated-absorption spectroscopy of (H2O)-O-18 at 1.4 mu m, using a low-power mirror-extended distributed-feedback diode laser. Although the rotational lines of the nu(1) + nu(3) band investigated in this work had a small transition dipole moment, saturation was possible thanks to a short Fabry-Perot cavity with a finesse of about 500. We investigated the sub-Doppler spectrum of the 2(12) –> 1(11) line for different sample gas pressures. A pressure-broadening coefficient of 32.9 +/- 0.7 MHz/Torr was measured. We also evaluated the saturation intensity as well as the transition dipole moment. To our knowledge, the observed Lamb dip represents the first narrow resonance at 1.4 mu m.
Journal/Review: APPLIED PHYSICS B-LASERS AND OPTICS
Volume: 70 (6) Pages from: 883 to: 888
KeyWords: molecular absorption line; saturation spectroscopy; high finesse cavityDOI: 10.1007/PL00021149Citations: 11data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-12-05References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here