16 June 1995 Feature of manifestation of light scattering phase effects and their influence on the Doppler signal of laser radar
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Abstract
Studies of various multicomponent laser Doppler radar (MLDR) demonstrated that polarization phase effects of scattering can in some cases considerably affect the signal-to- noise (s/n) ratio of the Doppler signal. A study of the Doppler signal is possible on the basis of the vector scattering theory and optical coherence theory. Simple expressions of the Doppler signal at the photodetector output, the polarization matching coefficient and photocurrent modulation depth for MLDR with a small angle between probing beams using various polarizations were arrived at. Analysis of these expressions demonstrates that if the probing beams have linear mutually orthogonal polarizations then intense influence of the polarization effects on the Doppler signal can be observed in the scattering plane with an angle of 45 degrees. On the basis of generalized results of the conducted studies of Doppler signal parameters for different probing beams' polarization, general properties of changes in Doppler signal's phase, that are observed independent of the scattering particles' parameters, are formulated.
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Vladimir M. Zemlianskii, Felix J. Yanovsky, "Feature of manifestation of light scattering phase effects and their influence on the Doppler signal of laser radar", Proc. SPIE 2472, Applied Laser Radar Technology II, (16 June 1995); doi: 10.1117/12.212027; https://doi.org/10.1117/12.212027
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