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14 February 2005 Analyses of signal-to-noise ratio in optical-fiber heterodyne-type laser Doppler anemometer
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Proceedings Volume 5776, Eighth International Symposium on Laser Metrology; (2005) https://doi.org/10.1117/12.611666
Event: Eighth International Conference on Laser Metrology, 2005, Merida, Mexico
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.
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Serguei Khotiaintsev, Luis Alonso Vazquez-Zuniga, and Heidy Beatriz Mejia del Puerto "Analyses of signal-to-noise ratio in optical-fiber heterodyne-type laser Doppler anemometer", Proc. SPIE 5776, Eighth International Symposium on Laser Metrology, (14 February 2005); https://doi.org/10.1117/12.611666
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