Application of antimonide lasers for gas sensing in the 3–4-µlm range

Anno: 1999

Autori: Werle P., Popov A.

Affiliazione autori: 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.

Giornale/Rivista: APPLIED OPTICS

Volume: 38 (9)      Da Pagina: 1494  A: 1501

Parole chiavi: OPTICAL MULTIPASS CELLS; QUANTUM CASCADE LASERS; INASSB LASERS; MU-M; SPECTROSCOPY; FLUCTUATIONS; NOISE
DOI: 10.1364/AO.38.001494

Citazioni: 48
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
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