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Proceedings Paper

Heavy-metal oxide glasses as potential materials for VIS fiber laser
Author(s): Kay Schuster; Johannes Kirchhof; Jens Kobelke; Anka Schwuchow; Michael Scheffler
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Paper Abstract

Variations of the lead germanate glasses composition were made and the effects in glass transition temperature, crystallization behavior and UV-VIS-IR transmission were studied. Reducing the lead content and partial substitution of oxides by fluorides causes a blue shift of the optical bandgap of bulk material of about 15 nm. However, the fluoride incorporation into the lead germanate glasses leads to a variation of sample composition by the evaporation of fluorides at temperatures around 1200 degrees Celsius. Spectral and time resolved fluorescence investigations on Tm3+ and Yb3+ doped lead germanate glasses were carried out. The samples show a weak red (650 nm), intensive blue (480 nm) and near-infrared (800 nm) emission under 976 nm excitation. A comparison of thulium fluorescence lifetimes in different glass hosts is given. The fiber drawing procedures of unstructured and multimode fibers and the loss behavior of the core and cladding glasses are described. Unstructured fibers show a minimum loss of about 0.3 dB(DOT)m-1 at 580 nm.

Paper Details

Date Published: 10 December 1999
PDF: 9 pages
Proc. SPIE 3849, Infrared Optical Fibers and Their Applications, (10 December 1999); doi: 10.1117/12.372793
Show Author Affiliations
Kay Schuster, Institute for Physical High Technology Jena (Germany)
Johannes Kirchhof, Institute for Physical High Technology Jena (Germany)
Jens Kobelke, Institute for Physical High Technology Jena (Germany)
Anka Schwuchow, Institute for Physical High Technology Jena (Germany)
Michael Scheffler, Institute for Physical High Technology Jena (Germany)

Published in SPIE Proceedings Vol. 3849:
Infrared Optical Fibers and Their Applications
Mohammed Saad; James A. Harrington, Editor(s)

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