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Proceedings Paper

Effect of diffraction on reflector on the enhancement of the mean and variance of reflected wave intensity
Author(s): Viktor A. Banakh; Valentina M. Sazanovich; Ruvim Sh. Tsvik
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Paper Abstract

The results of experimental study of the mean and variance of intensity of laser beam after double passage in turbulence are presented. The experiments were held in the artificial turbulent medium created with the use of the laboratory convectional generator of turbulence. The pathlength in measurements equaled 2 m, the refractive index structure constant Cn2 ranged up to about 5 (DOT) 10-11 cm-2/3. As a reflector the plane mirror was used and measurements were carried out at different sizes of mirror both on correlated path (when incident and returned waves pass along the same pathway) and in the case of considerable spacing their pathways. The mean intensity on the correlated path, as compared with uncorrelated one, is shown to increase when the reflector dimensions are multiple of even number of Fresnel zones and to decrease when dimensions are multiple of odd number of zones. Intensity relative variance is maximal if reflector diameter multiples to integer of Fresnel zones m and is minimal for the mirror sizes multiple to (m + 0.5) Fresnel zones.

Paper Details

Date Published: 15 June 1995
PDF: 11 pages
Proc. SPIE 2471, Atmospheric Propagation and Remote Sensing IV, (15 June 1995); doi: 10.1117/12.211957
Show Author Affiliations
Viktor A. Banakh, Institute of Atmospheric Optics (Russia)
Valentina M. Sazanovich, Institute of Atmospheric Optics (Russia)
Ruvim Sh. Tsvik, Institute of Atmospheric Optics (Russia)


Published in SPIE Proceedings Vol. 2471:
Atmospheric Propagation and Remote Sensing IV
J. Christopher Dainty, Editor(s)

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