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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 36 — Dec. 20, 2000
  • pp: 6918–6925

Simultaneous temperature and relative O2–N2 concentration measurements by single-shot pure rotational coherent anti-Stokes Raman scattering for pressures as great as 5 MPa

Martin Schenk, Thomas Seeger, and Alfred Leipertz  »View Author Affiliations


Applied Optics, Vol. 39, Issue 36, pp. 6918-6925 (2000)
http://dx.doi.org/10.1364/AO.39.006918


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Abstract

Dual-broadband pure rotational coherent anti-Stokes Raman scattering is a valuable nonintrusive tool for gas diagnosis that provides simultaneous and time-resolved information about temperature and relative species concentration. A systematic investigation of single-shot precision and accuracy of simultaneous measurement of temperature and O2/N2 concentration is presented. Various O2 concentrations (1.0–15.6%) in binary mixtures with N2 have been investigated in a temperature range from 300 to 773 K and for pressures of 1–50 bars (0.1–5 MPa). A comparison of two least-sum-squared differences fit evaluation procedures for the spectral shape, weighted constantly or inversely with respect to the relative signal intensity, is given. The results yielded good accuracy and precision for measuring temperature as well as concentration. The influence of temperature, O2 concentration, pressure, and evaluation techniques on both accuracy and precision is discussed.

© 2000 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.6780) Instrumentation, measurement, and metrology : Temperature
(290.5860) Scattering : Scattering, Raman
(300.6230) Spectroscopy : Spectroscopy, coherent anti-Stokes Raman scattering
(300.6420) Spectroscopy : Spectroscopy, nonlinear

History
Original Manuscript: February 29, 2000
Revised Manuscript: September 5, 2000
Published: December 20, 2000

Citation
Martin Schenk, Thomas Seeger, and Alfred Leipertz, "Simultaneous temperature and relative O2–N2 concentration measurements by single-shot pure rotational coherent anti-Stokes Raman scattering for pressures as great as 5 MPa," Appl. Opt. 39, 6918-6925 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-36-6918


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