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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 1 — Jan. 1, 2010
  • pp: 61–70

Technique of laser calibration for wavelength-modulation spectroscopy with application to proton exchange membrane fuel cell measurements

Ritobrata Sur, Thomas J. Boucher, Michael W. Renfro, and Baki M. Cetegen  »View Author Affiliations


Applied Optics, Vol. 49, Issue 1, pp. 61-70 (2010)
http://dx.doi.org/10.1364/AO.49.000061


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Abstract

A diode laser sensor was developed for partial pressure and temperature measurements using a single water vapor transition. The Lorentzian half-width and line intensity of the transition were calibrated for conditions relevant to proton exchange membrane (PEM) fuel cell operation. Comparison of measured and simulated harmonics from wavelength-modulation spectroscopy is shown to yield accuracy of ± 2.5 % in water vapor partial pressure and ± 3 ° C in temperature despite the use of a single transition over a narrow range of temperatures. Collisional half-widths in air or hydrogen are measured so that calibrations can be applied to both anode and cathode channels of a PEM fuel cell. An in situ calibration of the nonlinear impact of modulation on laser wavelength is presented and used to improve the accuracy of the numerical simulation of the signal.

© 2010 Optical Society of America

OCIS Codes
(300.1030) Spectroscopy : Absorption
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Spectroscopy

History
Original Manuscript: September 30, 2009
Revised Manuscript: November 25, 2009
Manuscript Accepted: November 25, 2009
Published: December 21, 2009

Citation
Ritobrata Sur, Thomas J. Boucher, Michael W. Renfro, and Baki M. Cetegen, "Technique of laser calibration for wavelength-modulation spectroscopy with application to proton exchange membrane fuel cell measurements," Appl. Opt. 49, 61-70 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-1-61

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