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Optics Letters

Optics Letters


  • Vol. 28, Iss. 21 — Nov. 1, 2003
  • pp: 2052–2054

Carbonyl sulfide detection with a thermoelectrically cooled midinfrared quantum cascade laser

Chad Roller, Anatoliy A. Kosterev, Frank K. Tittel, Kiyoji Uehara, Claire Gmachl, and Deborah L. Sivco  »View Author Affiliations

Optics Letters, Vol. 28, Issue 21, pp. 2052-2054 (2003)

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A compact absorption spectrometer with a midinfrared tunable quantum cascade laser operating at 4.86μm (2054 cm -1) is used to measure lower concentrations of carbonyl sulfide (COS) in air. A detection sensitivity of ~30 parts in 109 of COS and the selectivity of two stable isotopes, 12C16O32S and 12C 16O34S, are demonstrated. Specifically, the feasibility of detecting COS in expired human breath as a potential noninvasive medical diagnostic tool is investigated.

© 2003 Optical Society of America

OCIS Codes
(000.1430) General : Biology and medicine
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(300.1030) Spectroscopy : Absorption
(300.6340) Spectroscopy : Spectroscopy, infrared

Chad Roller, Anatoliy A. Kosterev, Frank K. Tittel, Kiyoji Uehara, Claire Gmachl, and Deborah L. Sivco, "Carbonyl sulfide detection with a thermoelectrically cooled midinfrared quantum cascade laser," Opt. Lett. 28, 2052-2054 (2003)

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