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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 30 — Oct. 20, 1998
  • pp: 7070–7075

Application of a diode-laser absorption technique with the D2 transition of atomic Rb for hypersonic flow-field measurements

Ole Trinks and Walter H. Beck  »View Author Affiliations


Applied Optics, Vol. 37, Issue 30, pp. 7070-7075 (1998)
http://dx.doi.org/10.1364/AO.37.007070


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Abstract

With a first application of semiconductor lasers to absorption measurements of seeded atomic Rb in high-enthalpy flow fields, a diagnostic technique for time-resolved determination of flow velocity and gas temperature with a line-shape analysis was developed. In our measurements a GaAlAs diode laser was used to scan repetitively at 15 kHz over 1.3 cm-1 across the D2 resonance transition (5S1/2 → 5P3/2, 780.2 nm) of seeded atomic Rb to obtain multiple absorption line shapes. The time-dependent signal contains highly resolved spectral line-shape information, which we interpret by fitting the spectrally resolved line shapes to Voigt profiles. Kinetic temperatures in the range 900–1400 K and gas velocities in the range 3900–6200 ms-1 were obtained from the Doppler-broadened component of the line shape and from the Doppler shift, respectively, of the absorption frequency.

© 1998 Optical Society of America

OCIS Codes
(120.6780) Instrumentation, measurement, and metrology : Temperature
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(300.1030) Spectroscopy : Absorption
(300.6210) Spectroscopy : Spectroscopy, atomic
(300.6260) Spectroscopy : Spectroscopy, diode lasers

History
Original Manuscript: March 4, 1998
Revised Manuscript: June 22, 1998
Published: October 20, 1998

Citation
Ole Trinks and Walter H. Beck, "Application of a diode-laser absorption technique with the D2 transition of atomic Rb for hypersonic flow-field measurements," Appl. Opt. 37, 7070-7075 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-30-7070


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References

  1. W. H. Beck, G. Eitelberg, D. Vennemann, “HEG–a new shock tunnel for high enthalpies,” presented at the European Forum on Wind Tunnels, University of Southampton, Southampton, UK, 14–17 September 1992.
  2. K. Hannemann, “Numerical simulation of chemically reacting hypersonic flows related to the HEG,” Internal Rep. 221-92 A16 [Institute for Fluid Mechanics, German Aerospace Research Establishment (DLR) (Deutsche Forschungsanstalt für Luft und Raumfahrt), Göttingen, Germany, 1992].
  3. R. M. Krek, G. Eitelberg, “Classical characterisation of HEG,” Internal Rep. 223-94 A 50 [Institute for Fluid Mechanics, German Aerospace Research Establishment (Deutsche Forschungsanstalt für Luft und Raumfahrt), Göttingen, Germany, 1994].
  4. W. H. Beck, C. Dankert, G. Eitelberg, G. Gundlach. “Preliminary laserinduced fluorescence measurements in several facilities in preparation for application to studies in the High Enthalpy Shock Tunnel Göttingen (HEG), paper AIAA-92-0143, presented at the Thirtieth Aerospace Sciences Meeting and Exhibit, Reno, Nev., 6–9 January 1992 (American Institute of Aeronautics and Astronautics, New York, 1992).
  5. D. Kastell, M. Carl, G. Eitelberg, “Phase step holographic interferometry applied to hypervelocity, non-equilibrium cylinder flow,” Exp. Fluids 22, 57–66 (1997). [CrossRef]
  6. B. Rosier, A. K. Mohamed, D. Henry, S. Juville, “Measures par spectroscopie d’absorption diode laser à la soufflerie F4,” Internal Rep. 8/4383 PY (Direction de la Physique Generale, Office National d’Etudes et de Recherches Aerospatiales, Chatillon, France, 1993).
  7. H. A. Chang, D. S. Baer, R. K. Hanson, “Semiconductor laser diagnostics of atomic oxygen for hypersonic flowfield measurements,” paper AIAA-92-0628, presented at the Thirtieth Aerospace Sciences Meeting and Exhibit, Reno, Nev., 6–9 January 1992 (American Institute of Aeronautics and Astronautics, New York, 1992).
  8. O. Trinks, “Diodenlaser-Absorptionsspektroskopie am atomaren Rubidium im Hochenthalpiekanal HEG zur Bestimmung der Strömungsgeschwindigkeit und Gastemperatur,” Internal Rep. 223-97 A31 [Institute for Fluid Mechanics, German Aerospace Center (Deutsche Forschungsanstalt für Luft und Raumfahrt), Göttingen, Germany, 1997].
  9. J. B. Taylor, I. Langmuir, Phys. Rev. 51, 753 (1936). [CrossRef]
  10. F. Wittgrefe, “Light-induced drift of rubidium and spectral properties of semiconductor lasers,” Ph.D. dissertation (University of Leiden, Leiden, The Netherlands, 1996).
  11. I. M. Vardavas, “Modelling reactive gas flows within shock tunnels,” Aust. J. Chem. 37, 157–177 (1984).
  12. M. K. McIntosh, “Computer program for the numerical calculation of frozen and equilibrium conditions in shock tunnels,” Internal Rep. (Department of Physics, Australian National University, Canberra, Australia, 1968).
  13. W. H. Beck, O. Trinks, M. Wollenhaupt, A. Mohamed, C. Niederbäumer, P. Andresen, T. Kishimoto, H. Bito, “Probing of the reservoir, free stream and shock layers in HEG using spectroscopic techniques,” presented at the Twenty-First International Symposium on Shock Waves, Great Keppel Island, Australia, 20–25 July 1997.

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