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Optics Letters

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  • Vol. 26, Iss. 20 — Oct. 15, 2001
  • pp: 1609–1611

Photoacoustic monitoring of trace gases by use of a diode-based difference frequency laser source

C. Fischer, M. W. Sigrist, Q. Yu, and M. Seiter  »View Author Affiliations


Optics Letters, Vol. 26, Issue 20, pp. 1609-1611 (2001)
http://dx.doi.org/10.1364/OL.26.001609


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Abstract

We present a compact mid-infrared laser spectrometer for trace-gas monitoring. Difference frequency generation in periodically poled LiNbO3 is used as laser source, yielding a tuning range 3.2–3.7μm at a linewidth of 154 MHz. The relatively high average power of 3 to 5 mW favors detection with a small resonant photoacoustic gas cell. Measurements of methane yield a detection limit in the low parts in 106 by volume concentration range.

© 2001 Optical Society of America

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3600) Lasers and laser optics : Lasers, tunable
(280.1120) Remote sensing and sensors : Air pollution monitoring
(280.3420) Remote sensing and sensors : Laser sensors
(300.6260) Spectroscopy : Spectroscopy, diode lasers
(300.6430) Spectroscopy : Spectroscopy, photothermal

Citation
C. Fischer, M. W. Sigrist, Q. Yu, and M. Seiter, "Photoacoustic monitoring of trace gases by use of a diode-based difference frequency laser source," Opt. Lett. 26, 1609-1611 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-20-1609


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References

  1. M. Seiter and M. W. Sigrist, Infrared Phys. Technol. 41, 259 (2000).
  2. D. Richter, D. G. Lancaster, R. F. Curl, and F. K. Tittel, Appl. Phys. B 67, 347 (1998).
  3. D. Mazzotti, G. Giusfredi, P. De Natale, J. Mitchell, and L. Hollberg, in Advanced Semiconductor Lasers and Their Applications, L. Holberg and R. J. Lang, eds., Vol. 31 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2000), p. 122.
  4. R. L. Sutherland, Handbook of Nonlinear Optics (Marcel Dekker, New York, 1996).
  5. M. Seiter and M. W. Sigrist, in Advanced Solid State Lasers, H. Injeyan, U. Keller, and C. Marshall, eds., Vol. 34 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2000), p. 266.
  6. M. W. Sigrist, ed., Air Monitoring by Spectroscopic Techniques, Vol. 127 of Chemical Analysis Series (Wiley, New York, 1994), Chap. 4.
  7. Ch. Hornberger, M. König, S. B. Rai, and W. Demtröder, Chem. Phys. 190, 171 (1995).
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