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Proceedings Paper

Accuracy of Doppler and grating velocimeters
Author(s): Ivan A. Popov; Leonid M. Veselov; Steen Gruner Hanson; Alex J. Gluzmann
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Paper Abstract

The statistical properties of photodetector current noise in Doppler and grating schemes are analyzed; in particular, the effect of speckle averaging over the receiving aperture is discussed. It is shown that in the typical configurations of both schemes shot noise prevails over other sources of noise. The dependence of the potential accuracy on the signal-to-noise ratio is established in both schemes. Also, it is shown that the relative frequency spread of the Doppler shifted component and the informational component in the grating scheme can be less than 0.1% with a signal-noise ratio exceeding 100.

Paper Details

Date Published: 22 May 2000
PDF: 6 pages
Proc. SPIE 4072, Fourth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2000); doi: 10.1117/12.386770
Show Author Affiliations
Ivan A. Popov, S.I. Vavilov State Optical Institute (Russia)
Leonid M. Veselov, Walsh Medical Devices Inc. (Russia)
Steen Gruner Hanson, Risoe National Lab. (Denmark)
Alex J. Gluzmann, George Kelk Corp. (Canada)


Published in SPIE Proceedings Vol. 4072:
Fourth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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