Application of antimonide lasers for gas sensing in the 3–4-µlm range
Year: 1999
Authors: Werle P., Popov A.
Autors Affiliation: Fraunhofer Institut, Kreuzeckbahnstrasse 19, Garmisch-Partenkirchen, 82467, Germany; Ioffe Physico Technical Institute, St. Petersburg, 194021, Russian Federation; Fachbereich Physik, AG Integrierte Optoelektronik, Universität Kaiserslautern, Kaiserslautern, 67653, Germany
Abstract: Antimonide semiconductor laser devices designed for continuous-wave emission in the 3–4–µm spectral range have been investigated with respect to spectroscopic applications. Representative data on the mode structure, output power, noise characteristics, far-field pattern, and modulation response are presented. Selected laser devices have been applied for methane (CH4) and formaldehyde (HCHO) measurements by use of a high-frequency modulated diode laser spectrometer. From an Allan variance analysis of experimental data a detection limit for HCHO of 120 pptv (where 1 pptv = 10-12 volume mixing ratio) with a 40–s integration time and for CH4 of 2 ppbv (where 1 ppbv = 10-9 volume mixing ratio) with 20-s integration time were determined. The results show that, for selected gases, InAsSb lasers can be an alternative to lead-salt diode lasers.
Journal/Review: APPLIED OPTICS
Volume: 38 (9) Pages from: 1494 to: 1501
KeyWords: OPTICAL MULTIPASS CELLS; QUANTUM CASCADE LASERS; INASSB LASERS; MU-M; SPECTROSCOPY; FLUCTUATIONS; NOISEDOI: 10.1364/AO.38.001494ImpactFactor: 1.616Citations: 47data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-10References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here