OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 27 — Sep. 20, 2009
  • pp: 5061–5066

Enhanced sensitivity for the detection of trace gases using multiple line integrated absorption spectroscopy

Andreas Karpf and Gottipaty N. Rao  »View Author Affiliations


Applied Optics, Vol. 48, Issue 27, pp. 5061-5066 (2009)
http://dx.doi.org/10.1364/AO.48.005061


View Full Text Article

Enhanced HTML    Acrobat PDF (512 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

We describe a technique that enhances the sensitivity of a spectrometer for trace gas detection employing an external cavity continuously tunable CW quantum cascade laser and integrating the absorption spectra across multiple lines of the species. We demonstrate the power of this method by continuously recording the absorption spectra of N O 2 across the R branch from 1628.8 to 1634.5 cm 1 . By integrating the resulting spectra, the detection sensitivity of N O 2 is improved by a factor of 15 compared to the sensitivity achieved using single line laser absorption spectroscopy with the same apparatus. This procedure offers much shorter data acquisition times for the real-time monitoring of trace gas species compared to adding repeated scans of the spectra to improve the signal-to-noise ratio.

© 2009 Optical Society of America

OCIS Codes
(000.2170) General : Equipment and techniques
(010.1120) Atmospheric and oceanic optics : Air pollution monitoring
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(280.3420) Remote sensing and sensors : Laser sensors
(300.1030) Spectroscopy : Absorption
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:
Spectroscopy

History
Original Manuscript: May 6, 2009
Revised Manuscript: August 3, 2009
Manuscript Accepted: August 21, 2009
Published: September 10, 2009

Citation
Andreas Karpf and Gottipaty N. Rao, "Enhanced sensitivity for the detection of trace gases using multiple line integrated absorption spectroscopy," Appl. Opt. 48, 5061-5066 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-27-5061


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. United States Environmental Protection Agency, “National Air Quality Status and Trends Through 2007,” EPA-454/R-08-006, United States Environmental Protection Agency, 2008.
  2. A. A. Kosterev, R. F. Curl, F. K. Tittel, M. Rochat, M. Beck, D. Hofstetter, and J. Faist, “Chemical sensing with pulsed QC-DFB lasers operating at 6.6 μm,” Appl. Phys. B 75, 351-357 (2002). [CrossRef]
  3. F. K. Tittel, Y. Bakhirkin, A. Kosterev, and G. Wysocki, “Recent advances in trace gas detection using quantum and interband cascade lasers,” Rev. Laser Engin. 34, 275-282 (2006).
  4. G. Wysocki, R. Curl, F. Tittel, R. Maulini, J. Billiard, and J. Faist, “Widely tunable mode-hop free external cavity quantum cascade laser for high resolution spectroscopic applications,” Appl. Phys. B 81, 769-777 (2005). [CrossRef]
  5. A. Karpf and G. N. Rao, “Absorption and wavelength modulation spectroscopy of NO2 using a tunable, external cavity continuous wave quantum cascade laser,” Appl. Opt. 48, 408-413 (2009). [CrossRef] [PubMed]
  6. P. Werle, “A review of recent advances in semiconductor laser based gas monitors,” Spectrochim. Acta A 54, 197-236 (1998). [CrossRef]
  7. L. S. Rothman, D. Jacquemart, A. Barbe, D. Chris Benner, M. Birk, L. R. Brown, M. R. Carleer, C. Chackerian, Jr., K. Chance, L. H. Coudert, V. Dana, V. M. Devi, J.-M. Flaud, R. R. Gamache, A. Goldman, J.-M. Hartmann, K. W. Jucks, A. G. Maki, J.-Y. Mandin, S. T. Massie, J. Orphal, A. Perrin, C. P. Rinsland, M. A. H. Smith, J. Tennyson, R. N. Tolchenov, R. A. Toth, J. Vander Auwera, P. Varanasi, and G. Wagner, “The HITRAN 2004 molecular spectroscopic database,” J. Quant. Spectrosc. Radiat. Transfer 96, 139-204 (2005). [CrossRef]
  8. J. M. Hollas, High Resolution Spectroscopy, Second Edition (Wiley, 1998).
  9. C. N. Mikhailenko, Yu. L. Babikov, and V. F. Golovko, “Information-calculating system spectroscopy of atmospheric gases. The structure and main functions,” Atmos. Oceanic Opt. 18, 685-695 (2005).
  10. National Oceanic and Atmospheric Administration, “Average relative humidity,” http://lwf.ncdc.noaa.gov/oa/climate/online/ccd/avgrh.html.

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited