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Applied Optics

Applied Optics


  • Vol. 23, Iss. 1 — Jan. 1, 1984
  • pp: 57–60

Directional laser velocimetry without frequency biasing: part 2

Yogesh Agrawal and James B. Riley  »View Author Affiliations

Applied Optics, Vol. 23, Issue 1, pp. 57-60 (1984)

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In an earlier paper, Agrawal and McCullough demonstrated that a single laser beam focused at the point of measurement can be used to obtain both the magnitude and direction of local fluid velocity without the use of beam-splitting optics or frequency biasing devices. Additionally, the photoelectric signal was shown to be a zero-mean sine wave suitable for existing counter-type laser Doppler velocimeter signal processors. The method described in the above paper indicated the use of two offset photodetector arrays; the resulting photocurrents from the two arrays were correlated to give direction. In this paper we describe the implementation of the method using a self-scanning diode array. Detector sensitivity in the array is discussed and microchannel plate detectors are suggested for increased sensitivity.

© 1984 Optical Society of America

Original Manuscript: March 23, 1983
Published: January 1, 1984

Yogesh Agrawal and James B. Riley, "Directional laser velocimetry without frequency biasing: part 2," Appl. Opt. 23, 57-60 (1984)

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  1. Y. C. Agrawal, J. R. McCullough, Appl. Opt. 20, 1553 (1981). [CrossRef] [PubMed]
  2. M. J. Rudd, J. Phys. E 2, 723 (1969). [CrossRef]
  3. Y. C. Agrawal, “A CCD Chirp-Z FFT Doppler signal processor for laser velocimetry”, J. Phys. E. submitted for publication.

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