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Optics Letters

Optics Letters

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  • Vol. 30, Iss. 9 — May. 1, 2005
  • pp: 988–990

Photoacoustic detection of nitric oxide by use of a quantum-cascade laser

Angela Elia, Pietro Mario Lugarà, and Corrado Giancaspro  »View Author Affiliations


Optics Letters, Vol. 30, Issue 9, pp. 988-990 (2005)
http://dx.doi.org/10.1364/OL.30.000988


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Abstract

A photoacoustic trace-gas sensor for the measurement of nitric oxide with a detection limit of 500 parts in 10^9 has been demonstrated. The radiation source was a thermoelectrically cooled distributed-feedback quantum-cascade laser operating in pulsed mode near 5.3 µm with an average laser power of 8 mW. A resonant photoacoustic cell was excited in its first longitudinal mode by the modulated laser light. Preliminary measurements have been performed to test the performance of our photoacoustic sensor; possible improvements to reach lower detection limits are discussed.

© 2005 Optical Society of America

OCIS Codes
(140.5960) Lasers and laser optics : Semiconductor lasers
(280.1120) Remote sensing and sensors : Air pollution monitoring
(300.6430) Spectroscopy : Spectroscopy, photothermal

Citation
Angela Elia, Pietro Mario Lugarà, and Corrado Giancaspro, "Photoacoustic detection of nitric oxide by use of a quantum-cascade laser," Opt. Lett. 30, 988-990 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-9-988

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