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Proceedings Paper

Preparation, structure, and properties of Yb3+ FP laser glass
Author(s): Doris Ehrt; Thomas Toepfer
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Paper Abstract

Conditions for preparing samples of Yb3+-doped fluoroaluminate glasses of high optical quality ((Delta) n -6), their structure, and optical properties have been studied while varying the phosphate (5 to 40 mol%) and the Yb3+ content (5 to 12 X 1020 ions/cm3). Refractive index and dispersion increase the higher the phosphate content. Adding Nb2O5 to the glass composition or substituting phosphate by sulfate increases the non-linear refractive index, due to an enhanced asymmetry of the Yb3+ sites resulting in larger cross sections for absorption and emission. Depending on melt composition the fluorescence lifetime of the 2F5/2 laser level drops from 2.0 and 1.1 ms when phosphate content is increased but it shows no concentration quenching at higher Yb3+-doping levels. Glasses exhibit a very low OH content with an absorption of less than 0.1 cm-1 at around 3000 cm-1.

Paper Details

Date Published: 25 October 2000
PDF: 11 pages
Proc. SPIE 4102, Inorganic Optical Materials II, (25 October 2000); doi: 10.1117/12.405273
Show Author Affiliations
Doris Ehrt, Univ. of Jena (Germany)
Thomas Toepfer, Univ. of Jena (Germany)

Published in SPIE Proceedings Vol. 4102:
Inorganic Optical Materials II
Alexander J. Marker; Eugene G. Arthurs, Editor(s)

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