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Scattering loss in Nd-doped silica based optical fibers

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Rare-earth doped fibers suffer from relatively high attenuation in comparison to conventional communication fibers. In order to improve the properties of such fibers, understanding of the mechanisms involved in scattering effects is of great importance. The effect of Nd-doping, Al-codoping and of the drawing temperature on the scattering effect was investigated for several different optical fibers. To this end a measuring setup was realized which allows absolute measurements of the scattering coefficient at different positions along a fiber. Also separation of total attenuation and scattering effects is possible. The presented results indicate scattering effects as primary source for increased attenuation compared with undoped fibers.

Keywords: Optical fibers; fiber attenuation; fiber scattering loss; rare-earth doping

Document Type: Original Article


Affiliations: Institute for Physical High Technology, Winzerlaer Str. 10, 07751 Jena, Germany

Publication date: November 1, 2002

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