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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 2 — Jan. 15, 2009
  • pp: 181–183

Alternative method for gas detection using pulsed quantum-cascade-laser spectrometers

Bruno Grouiez, Bertrand Parvitte, Lilian Joly, and Virginie Zeninari  »View Author Affiliations


Optics Letters, Vol. 34, Issue 2, pp. 181-183 (2009)
http://dx.doi.org/10.1364/OL.34.000181


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Abstract

Pulsed quantum-cascade-laser (QCL) spectrometers are usually used to detect atmospheric gases with either the interpulse technique (short pulses, typically 5 20 ns ) or the intrapulse technique (long pulses, typically 500 800 ns ). Each of these techniques has many drawbacks, which we present. Particularly the gas absorption spectra are generally distorted. We demonstrate the possibility to use intermediate pulses (typically 50 100 ns ) for gas detection using pulsed QCL spectrometers. IR spectra of ammonia recorded in the 10 μ m region are presented in various conditions of pulse emission. These experiences demonstrate the large influence of the pulse shape on the recorded spectrum and the importance to use our alternative method for gas detection with pulsed QCL spectrometers.

© 2009 Optical Society of America

OCIS Codes
(280.3420) Remote sensing and sensors : Laser sensors
(300.6360) Spectroscopy : Spectroscopy, laser
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Spectroscopy

History
Original Manuscript: October 20, 2008
Revised Manuscript: November 26, 2008
Manuscript Accepted: November 29, 2008
Published: January 14, 2009

Citation
Bruno Grouiez, Bertrand Parvitte, Lilian Joly, and Virginie Zeninari, "Alternative method for gas detection using pulsed quantum-cascade-laser spectrometers," Opt. Lett. 34, 181-183 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-2-181


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