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16 March 2015 The REPUSIL process and the capability of fluorine doping for the adjustment of optical and thermochemical properties in silica materials
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Proceedings Volume 9359, Optical Components and Materials XII; 935914 (2015) https://doi.org/10.1117/12.2077395
Event: SPIE OPTO, 2015, San Francisco, California, United States
Abstract
We report on the fluorine incorporation in powder based materials for the fabrication of Al and Al/Yb co-doped silica glasses. The achieved maximum Fluorine concentration of 1.55 mol% SiF4 corresponds to a refractive index decrease of -8 x 10-3. Simultaneously, the Tg of the doped material is reduced by about 200 K compared to pure silica. Moreover, the fluorine doping is also eminently suitable for the direct refractive index adjustment in active doped silica glass materials (e.g. Al/Yb or Al/Tm). The index matching with pure silica is possible to date up to 2.7 mol% Al2O3 and 0.1 mol% Yb2O3. The additional influence on the blue shift of the UV transmission will also be discussed.
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K. Schuster, St. Grimm, A. Kalide, Jan Dellith, M. Leich, A. Schwuchow, S. Unger, A. Langner, G. Schötz, and H. Bartelt "The REPUSIL process and the capability of fluorine doping for the adjustment of optical and thermochemical properties in silica materials", Proc. SPIE 9359, Optical Components and Materials XII, 935914 (16 March 2015); doi: 10.1117/12.2077395; https://doi.org/10.1117/12.2077395
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