OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 19 — Jul. 1, 2003
  • pp: 3843–3852

Passive Directional Discrimination in Laser-Doppler Anemometry by the Two-Wavelength Quadrature Homodyne Technique

Lars Büttner and Jürgen Czarske  »View Author Affiliations


Applied Optics, Vol. 42, Issue 19, pp. 3843-3852 (2003)
http://dx.doi.org/10.1364/AO.42.003843


View Full Text Article

Acrobat PDF (196 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

We report a method for passive optical directional discrimination in laser-Doppler anemometers. For this purpose frequency-shift elements such as acousto-optic modulators, which are bulky and difficult to align during assembly, have traditionally been employed. We propose to use a quadrature homodyne technique to achieve directional discrimination of the fluid flow without any frequency-shift elements. It is based on the employment of two laser wavelengths, which generate two interference fringe systems with a phase shift of a quarter of the common fringe spacing. Measurement signal pairs with a direction-dependent phase shift of ±π/2 are generated. As a robust signal-processing technique, the cross-correlation technique is used. The principles of quadrature homodyne laser-Doppler anemometry are investigated. A setup that provides a constant phase shift of π/2 throughout the entire measurement volume was achieved with both single-mode and multimode radiation. The directional discrimination was successfully verified with wind tunnel measurements. The complete passive technique offers the potential of building miniaturized measurement heads that can be integrated, e.g., into wind tunnel models.

© 2003 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.7250) Instrumentation, measurement, and metrology : Velocimetry

Citation
Lars Büttner and Jürgen Czarske, "Passive Directional Discrimination in Laser-Doppler Anemometry by the Two-Wavelength Quadrature Homodyne Technique," Appl. Opt. 42, 3843-3852 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-19-3843


Sort:  Author  |  Year  |  Journal  |  Reset

References

  1. L. E. Drain, The Laser Doppler Technique (Wiley, New York, 1980).
  2. H.-E. Albrecht, M. Borys, N. Damaschke, and C. Tropea, Laser Doppler and Phase Doppler Measurement Techniques (Springer-Verlag, Berlin, 2003).
  3. M. H. Koelink, F. F. M. de Mul, A. L. Weijers, J. Greve, R. Graaff, A. C. M. Dassel, and J. G. Aarnoudse, “Fiber-coupled self-mixing diode-laser Doppler velocimeter: technical aspects and flow velocity profile disturbances in water and blood,” Appl. Opt. 33, 5628–5641 (1994).
  4. H. W. Jentink, M. Stiegelmeier, and C. Tropea, “In-flight measurements using laser Doppler anemometry,” J. Aircr. 31, 444–446 (1993).
  5. C. Egbers, W. Brasch, B. Sitte, J. Immohr, and J. R. Schmidt, “Estimates on diagnostic methods for investigations of thermal convection between spherical shells in space,” Meas. Sci. Technol. 10, 866–877 (1999).
  6. S. Damp, “Use of modified miniature-LDA in high spatial resolution application,” in Proceedings of the International Congress on Instrumentation in Aerospace Simulation Facilities (Institute of Electrical and Electronics Engineers, Piscataway, N.J., 1995), pp. 21.1–21.5.
  7. F. Leopold, E. Augenstein, S. Damp, F. Christmacher, and E. Bacher, “LDA measurements and visualization of the supersonic flow around a longitudinal cylinder with different surface roughnesses,” in Proceedings of the 9th International Symposium on Applications of Laser Techniques to Fluid Mechanics, R. J. Adrian, D. F. G. Durao, F. Durst, M. V. Heitor, M. Maeda, and J. H. Whitelaw, eds. (n.p, Lisbon, Portugal, 1998), pp. 2.3.1–2.3.8.
  8. T. Iko, R. Sawada, and E. Higurashi, “Integrated microlaser Doppler velocimeter,” J. Lightwave Technol. 17, 30–34 (1999).
  9. H. Nishihara, K. Matsumoto, and J. Koyama, “Use of a laser diode and an optical fiber for a compact laser-Doppler velocimeter,” Opt. Lett. 9, 62–64 (1984).
  10. M. Stiegelmeier and C. Tropea, “Mobile fiber-optic laser Doppler anemometer,” Appl. Opt. 31, 4096–4105 (1992).
  11. J. Czarske, “A miniaturized dual-fibre laser Doppler sensor,” Meas. Sci. Technol. 12, 1191–1198 (2001).
  12. L. Büttner and J. Czarske, “A multimode-fibre laser-Doppler anemometer for highly spatially resolved velocity measurements using low-coherence light,” Meas. Sci. Technol. 12, 1891–1903 (2001).
  13. P. Miles and P. Witze, “Evaluation of the Gaussian beam model for prediction of LDV fringe fields,” in Proceedings of the International Symposium on Applications of Laser Techniques to Fluid Mechanics, R. J. Adrian, D. F. G. Durao, F. Durst, M. V. Heitor, M. Maeda, and J. H. Whitelaw, eds. (n.p, Lisbon, Portugal, 1996), pp. 40.1.1–40.1.8.
  14. J. Czarske, F. Hock, and H. Müller, “Applications of diffraction gratings in the laser Doppler velocimetry,” in 16th Congress of the International Commission for Optics: Optics As a Key to High Technology, G. Akos, T. Lippenyi, G. Lupkovics, and A. Podmaniczky, eds., Proc. SPIE 1983, 654–655 (1993).
  15. E. B. Li and A. K. Tieu, “Analysis of the three-dimensional fringe pattern formed by the interference of ideal and astigmatic Gaussian beams,” in Proceedings of the 9th International Symposium on Applications of Laser Techniques to Fluid Mechanics, R. J. Adrian, D. F. G. Durao, F. Durst, M. V. Heitor, M. Maeda, and J. H. Whitelaw, eds. (n.p, Lisbon, Portugal, 1998), pp. 15.5.1–15.5.6.
  16. Melles Griot Optics catalog (Melles Griot, Carlsbad, Calif., 1999).

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