Accuracy of Doppler and grating velocimeters

Ivan A. Popov; Leonid M. Veselov; Steen Gruner Hanson; Alex J. Gluzmann

doi:10.1117/12.386770

22 May 2000 Accuracy of Doppler and grating velocimeters

Ivan A. Popov, Leonid M. Veselov, Steen Gruner Hanson, Alex J. Gluzmann

Proceedings Volume 4072, Fourth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (2000) https://doi.org/10.1117/12.386770
Event: 4th International Conference on Vibration Measurement by Laser Techniques, 2000, Ancona, Italy

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.

Citation Download Citation

Ivan A. Popov, Leonid M. Veselov, Steen Gruner Hanson, and Alex J. Gluzmann "Accuracy of Doppler and grating velocimeters", Proc. SPIE 4072, Fourth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2000); https://doi.org/10.1117/12.386770

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