Photodarkening of Infrared Irradiated Yb3+-Doped Alumino-Silicate Glasses: Effect on UV Absorption Bands and Fluorescence Spectra
| Autor: | Stefano Taccheo, Francesca Stefania Freyria, Hrvoje Gebavi, David Mechin, Achille Monteville, Barbara Bonelli, Daniel Milanese, Thierry Robin |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Ytterbium
Materials science photodarkening Yb-doped fibers high power lasers Infrared chemistry.chemical_element 02 engineering and technology Photochemistry 01 natural sciences Ion 010309 optics Biomaterials lcsh:TP890-933 lcsh:TP200-248 0103 physical sciences Irradiation Emission spectrum lcsh:QH301-705.5 Civil and Structural Engineering business.industry Doping lcsh:Chemicals: Manufacture use etc 021001 nanoscience & nanotechnology lcsh:QC1-999 lcsh:Biology (General) chemistry Mechanics of Materials Photodarkening Ceramics and Composites Optoelectronics lcsh:Textile bleaching dyeing printing etc 0210 nano-technology business lcsh:Physics Excitation |
| Zdroj: | Fibers; Volume 1; Issue 3; Pages: 101-109 Fibers, Vol 1, Iss 3, Pp 101-109 (2013) |
| ISSN: | 2079-6439 |
| DOI: | 10.3390/fib1030101 |
| Popis: | The photodarkening phenomenon in alumino-silicate glass preforms, doped with different ytterbium concentrations, was studied. The UV band, comprised between 180 and 350 nm, was examined before and after irradiation at 976 nm. The non- linear dependence of 240 nm band with concentration after infra-red irradiation was demonstrated and ascribed predominantly to Yb3+ pair’s interaction. The emission spectrum after the excitation in UV spectral region showed increased intensity after photodarkening, probably due to Yb2+ ions creation. Phenomenological photodarkening model and the possible existence of several defect types are presented. |
| Databáze: | OpenAIRE |
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