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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 9 — Mar. 20, 1999
  • pp: 1494–1501

Application of Antimonide Lasers for Gas Sensing in the 3-4-μm Range

Peter Werle and Andrei Popov  »View Author Affiliations


Applied Optics, Vol. 38, Issue 9, pp. 1494-1501 (1999)
http://dx.doi.org/10.1364/AO.38.001494


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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 (CH<sub>4</sub>) 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<sup>−12</sup> volume mixing ratio) with a 40-s integration time and for CH<sub>4</sub> of 2 ppbv (where 1 ppbv = 10<sup>−9</sup> 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.

© 1999 Optical Society of America

OCIS Codes
(010.1120) Atmospheric and oceanic optics : Air pollution monitoring
(140.2020) Lasers and laser optics : Diode lasers
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(300.6260) Spectroscopy : Spectroscopy, diode lasers
(300.6340) Spectroscopy : Spectroscopy, infrared
(300.6380) Spectroscopy : Spectroscopy, modulation

Citation
Peter Werle and Andrei Popov, "Application of Antimonide Lasers for Gas Sensing in the 3-4-μm Range," Appl. Opt. 38, 1494-1501 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-9-1494

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