Journal
OPTICAL MATERIALS EXPRESS
Volume 5, Issue 4, Pages 887-897Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.5.000887
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Funding
- Free State of Thuringia
- European Social Fund (ESF) [2011 FGR 0104]
- Federal Ministry of Education and Research (BMBF) [13 N 9555, 13 N 12712]
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We report on the fluorine doping and codoping of powder-based silica bulk glasses fabricated using REPUSIL (Reactive Powder Sintering of Silica) technology. The maximum doping level of 1.5 mol% of SiF4 is associated with a refractive index decrease by -8 x 10(-3) compared to undoped silica and an essential decrease in the transition temperature by about 200 K. Fluorine codoping is eminently suitable for the direct refractive index adjustment of actively-doped silica glass materials (e.g., Al/Yb or Al/Tm). The fluorine codoping of Al/Yb silica glass significantly reduces parasitic photodarkening processes. (C) 2015 Optical Society of America
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