Steady photodarkening of thulium alumino-silicate fibers pumped at 1.07  μm: quantitative effect of lanthanum, cerium, and thulium

By pumping thulium-doped silica-based fibers at 1.07 μm, rapid generation of absorbing centers leads to photoinduced attenuation (PIA). This detrimental effect prevents exploiting laser emissions in the visible and near infrared. We report on the characterization of the PIA versus the fiber core com...

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Published inOptics letters Vol. 41; no. 12; p. 2771
Main Authors Lupi, Jean-François, Vermillac, Manuel, Blanc, Wilfried, Mady, Franck, Benabdesselam, Mourad, Dussardier, Bernard, Neuville, Daniel R
Format Journal Article
LanguageEnglish
Published United States 15.06.2016
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Summary:By pumping thulium-doped silica-based fibers at 1.07 μm, rapid generation of absorbing centers leads to photoinduced attenuation (PIA). This detrimental effect prevents exploiting laser emissions in the visible and near infrared. We report on the characterization of the PIA versus the fiber core composition, particularly the concentration of thulium (Tm), lanthanum (La), and cerium (Ce) ions. We show that UV emission induced by Tm-Tm energy transfers is the source of photodarkening and that lanthanum and cerium are efficient hardeners against PIA.
ISSN:1539-4794
DOI:10.1364/OL.41.002771