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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 65, Iss. 1 — Jan. 1, 1975
  • pp: 69–77

Analytical evaluation of techniques for use of a laser Doppler velocimeter to measure flow and turbulence

C. Y. She and L. S. Wall  »View Author Affiliations

JOSA, Vol. 65, Issue 1, pp. 69-77 (1975)

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Results of autocorrelation functions and power spectral densities of laser Doppler velocimeters in the reference-beam-heterodyning and the cross-beam-mixing mode are derived to handle turbulence measurements, Doppler ambiguity, spatial coherence, and effects of particle concentration and detection aperture. A useful definition of signal-to-noise ratio is given for both correlation and spectral analyses. The signal-to-noise calculation provides a direct comparison of the figures of merit between various arrangements of a laser Doppler velocimeter with methods for signal processing to measure optically the flow properties of a fluid under given experimental conditions.

C. Y. She and L. S. Wall, "Analytical evaluation of techniques for use of a laser Doppler velocimeter to measure flow and turbulence," J. Opt. Soc. Am. 65, 69-77 (1975)

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