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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 26, Iss. 12 — Jun. 15, 2001
  • pp: 887–889

Photoacoustic spectroscopy with quantum cascade distributed-feedback lasers

Daniel Hofstetter, Mattias Beck, Jérôme Faist, Markus Nägele, and Markus W. Sigrist  »View Author Affiliations


Optics Letters, Vol. 26, Issue 12, pp. 887-889 (2001)
http://dx.doi.org/10.1364/OL.26.000887


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Abstract

We present photoacoustic (PA) spectroscopy measurements of carbon dioxide, methanol, and ammonia. The light source for the excitation was a single-mode quantum cascade distributed-feedback laser, which was operated in pulsed mode at moderate duty cycle and slightly below room temperature. Temperature tuning resulted in a typical wavelength range of 3cm-1at a linewidth of 0.2cm-1. The setup was based on a Herriott multipass arrangement around the PA cell; the cell was equipped with a radial 16-microphone array to increase sensitivity. Despite the relatively small average laser power, the ammonia detection limit was 300 parts in 109by volume.

© 2001 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(140.5960) Lasers and laser optics : Semiconductor lasers
(300.6430) Spectroscopy : Spectroscopy, photothermal

Citation
Daniel Hofstetter, Mattias Beck, Jérôme Faist, Markus Nägele, and Markus W. Sigrist, "Photoacoustic spectroscopy with quantum cascade distributed-feedback lasers," Opt. Lett. 26, 887-889 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-12-887

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