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Proceedings Paper

Analyses of signal-to-noise ratio in optical-fiber heterodyne-type laser Doppler anemometer
Author(s): Serguei Khotiaintsev; Luis Alonso Vazquez-Zuniga; Heidy Beatriz Mejia del Puerto
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Paper Abstract

In this work, we present a new mathematical model of signal formation in the optical-fiber heterodyne-type LDA. This model accounts for different noise sources in the LDA including those associated with the optical-fiber guides used in the LDA. This model allows one to access the signal-to-noise ratio (SNR) of the optical-fiber LDA as a function of the optical fiber parameters and characteristcs of the laser source and photo-detector. We obtained the SNR under some typical combinations of LDA parameters. These included the laser power, photo-detector response, fiber attenuation, etc. Our analyses revealed the relative importance of different optical fiber parameters (optical absorption, Rayleigh and Brillouin scattering, etc) that together with the laser and photo-detector characteristics contribute to the SNR of the optical-fiber heterodyne-type LDA.

Paper Details

Date Published: 14 February 2005
PDF: 12 pages
Proc. SPIE 5776, Eighth International Symposium on Laser Metrology, (14 February 2005); doi: 10.1117/12.611666
Show Author Affiliations
Serguei Khotiaintsev, Univ. Nacional Autonoma de Mexico (Mexico)
Luis Alonso Vazquez-Zuniga, Univ. Nacional Autonoma de Mexico (Mexico)
Heidy Beatriz Mejia del Puerto, Univ. Nacional Autonoma de Mexico (Mexico)

Published in SPIE Proceedings Vol. 5776:
Eighth International Symposium on Laser Metrology
R. Rodriguez-Vera; F. Mendoza-Santoyo, Editor(s)

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