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Proceedings Paper

Ultraviolet absorption and excess optical loss in preforms and fibers with high germanium content
Author(s): Valery M. Mashinsky; Eugeni M. Dianov; Vladimir B. Neustruev; Sergei V. Lavrishchev; Alexei N. Guryanov; Vladimir F. Khopin; Nikolai N. Vechkanov; Oleg D. Sazhin
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Paper Abstract

Nature of excess optical loss in fibers with high (up to 35 mol.%) GeO2 content silica core was studied experimentally. The absorption and scattering loss dependences on the drawing conditions were studied as well as the behavior of germanium-related oxygen- deficient centers (GODC) absorbing in UV spectral region. The peculiarity of such fibers was found to be in the drastic increase of the absorption and scattering loss when the core diameter diminish up to 3-3.5 micrometers . According to the excess loss analysis the absorption loss is caused by the enhanced GODC formation and the Ge-related drawing-induced defects. The excess scattering loss which dominates is assumed to be due to azimuthal and longitudinal core inhomogeneities caused by hydrodynamical instabilities of viscous glass during the fiber drawing. The germanium diffusion effect on optical loss is discussed.

Paper Details

Date Published: 28 September 1994
PDF: 8 pages
Proc. SPIE 2290, Fiber Optic Materials and Components, (28 September 1994); doi: 10.1117/12.187406
Show Author Affiliations
Valery M. Mashinsky, General Physics Institute (Russia)
Eugeni M. Dianov, General Physics Institute (Russia)
Vladimir B. Neustruev, General Physics Institute (Russia)
Sergei V. Lavrishchev, General Physics Institute (Russia)
Alexei N. Guryanov, Institute for High-Pure Substances Chemistry (Russia)
Vladimir F. Khopin, Institute for High-Pure Substances Chemistry (Russia)
Nikolai N. Vechkanov, Institute for High-Pure Substances Chemistry (Russia)
Oleg D. Sazhin, Moscow State Univ. (Russia)

Published in SPIE Proceedings Vol. 2290:
Fiber Optic Materials and Components
Hakan H. Yuce; Dilip K. Paul; Roger A. Greenwell, Editor(s)

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