Analyses of signal-to-noise ratio in optical-fiber heterodyne-type laser Doppler anemometer
Por:
Khotiaintsev S., Vazquez-Zuñiga L.A., Del Puerto H.B.M.
Publicada:
1 ene 2005
Resumen:
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 characteristics 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.
Filiaciones:
Khotiaintsev S.:
Faculty of Engineering, National Autonomous University of Mexico, C.U., 04510, Mexico, D.F., Mexico
Vazquez-Zuñiga L.A.:
Faculty of Engineering, National Autonomous University of Mexico, C.U., 04510, Mexico, D.F., Mexico
Del Puerto H.B.M.:
Faculty of Engineering, National Autonomous University of Mexico, C.U., 04510, Mexico, D.F., Mexico
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