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Optics Letters

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  • Vol. 24, Iss. 3 — Feb. 1, 1999
  • pp: 178–180

Photoacoustic spectroscopy using quantum-cascade lasers

B. A. Paldus, T. G. Spence, R. N. Zare, J. Oomens, F. J. M. Harren, D. H. Parker, C. Gmachl, F. Cappasso, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, and A. Y. Cho  »View Author Affiliations


Optics Letters, Vol. 24, Issue 3, pp. 178-180 (1999)
http://dx.doi.org/10.1364/OL.24.000178


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Abstract

Photoacoustic spectra of ammonia and water vapor were recorded by use of a continuous-wave quantum-cascade distributed-feedback (QC-DFB) laser at 8.5 μm with a 16-mW power output. The gases were flowed through a cell that was resonant at 1.6 kHz, and the QC-DFB source was temperature tuned over 35 nm for generation of spectra or was temperature stabilized on an absorption feature peak to permit real-time concentration measurements. A detection limit of 100 parts in 109 by volume ammonia at standard temperature and pressure was obtained for a 1-Hz bandwidth in a measurement time of 10 min.

© 1999 Optical Society of America

OCIS Codes
(000.1570) General : Chemistry
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(140.5960) Lasers and laser optics : Semiconductor lasers

Citation
B. A. Paldus, T. G. Spence, R. N. Zare, J. Oomens, F. J. M. Harren, D. H. Parker, C. Gmachl, F. Cappasso, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, and A. Y. Cho, "Photoacoustic spectroscopy using quantum-cascade lasers," Opt. Lett. 24, 178-180 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-3-178


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