Overtone molecular spectroscopy using semiconductor diode laser in the 1-2 µm region
Authors: Pavone F.S., Ernst Krzysztof, Chudzynski Stanislav, Pokona Marcin, Lundsberg-Nielsen Line, Cancio Pastor Pablo
Autors Affiliation: Univ of Florence, Firenze, Italy
Abstract: We are working on the overtone molecular detection using diode lasers emitting between one and two microns. We have used a multimode double heterojunction InGaAsP diode laser emitting at 1.2 µm for detecting a second overtone of HCl. A derivative signal at 1 Torr (P(3) component) is presented. A pressure broadening dependence for the same component is shown. Other measurements have been performed on a first overtone of NH3 at 1.65 µm using an InGaAsP distributed feedback laser. Detection limits are presented in presence of air at different temperatures.
More Information: – EPS-Quantum Electronics and Optics Division; IEEE; Optical Society of AmericaKeyWords: Air; Ammonia; Heterojunctions; Hydrochloric acid; Light emission; Semiconducting indium compounds; Semiconductor lasers, Linewidth; Mode hopping; Overtone molecular spectroscopy; Pressure broadening, Molecular spectroscopyDOI: 10.1109/EQEC.1994.698518