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Proceedings Paper

Light Scattering By Voids In Polycrystalline Fibers
Author(s): L. N. Butvina; V. V. Vojtsekhovsky; E. M. Dianov; A. M. Prokhorov
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Paper Abstract

The mechanisms of light scattering losses ∝s in fibers fabricated by plastic deformation of silver and thallium halide crystals have been analysed. It was found that the power index 7 in the loss dependence on wavelenght λ(∝s-7) continuosly changes in the range -0.5< η(λ)≤3, depending on the crystal material and its history, manufacturing conditions and evolution of fibers. On the basis of this and on the consideration of the plastic deformation we suggested that vacancy micropores or voids are the fundamental phisical reason which determines the scattering losses in polycrystalline fibers. The crossection of scattering and η(λ) is calculated for inclusions and voids with the relative refractive index 0.2≤ m ≤0.2. We explain the behaviour of ∝s and η by evolution of the micropores distribution and by exsistence of vacancy excess in fibers. The average diameter D of effective micropores and their concentration N are determined from the spectra We observed these micropores in KRS-5 and KRS-13 polycrystalline fibers.

Paper Details

Date Published: 1 January 1987
PDF: 7 pages
Proc. SPIE 0843, Infrared Optical Materials and Fibers V, (1 January 1987); doi: 10.1117/12.968221
Show Author Affiliations
L. N. Butvina, Academy of Sciences of the USSR (Russian Federation)
V. V. Vojtsekhovsky, Academy of Sciences of the USSR (Russian Federation)
E. M. Dianov, Academy of Sciences of the USSR (Russian Federation)
A. M. Prokhorov, Academy of Sciences of the USSR (Russian Federation)

Published in SPIE Proceedings Vol. 0843:
Infrared Optical Materials and Fibers V
Paul Klocek, Editor(s)

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