Nanoparticle doping and molten-core methods towards highly thulium-doped silica fibers for 0.79 μm-pumped 2 μm fiber lasers – A fluorescence lifetime study

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F24%3A00598316" target="_blank" >RIV/67985882:_____/24:00598316 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22310/24:43929781
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0022231324003995?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0022231324003995?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jlumin.2024.120835" target="_blank" >10.1016/j.jlumin.2024.120835</a>

Result language
angličtina
Original language name
Nanoparticle doping and molten-core methods towards highly thulium-doped silica fibers for 0.79 μm-pumped 2 μm fiber lasers – A fluorescence lifetime study
Original language description
We study the fluorescence lifetime of Thulium-doped silica fibers for efficient laser operation in the 2 mu m ´eye-safe´ wavelength range pumped by 0.79 mu m radiation. A large set of optical fibers prepared by Modified Chemical Vapor Deposition combined with solution doping or nanoparticle doping, and Molten-core method is investigated in terms of fluorescence lifetimes of the 3 F 4 and 3 H 4 excited levels, which contain information about the Tm3+ 3 + ion environment, the rate of unwanted processes, such as concentration quenching or multiphonon relaxation, as well as the inter-ionic energy-transfer processes, including the cross-relaxation. Maximum evaluated lifetime values are 778 mu s for the 3 F 4 level and 56 mu s for the 3 H 4 level. From the lifetime study, we conclude that for Tm3+ 3 + concentrations above 10,000 ppm and enhanced aluminum concentrations above 5 mol. % Al2O3, 2 O 3 , the cross-relaxation efficiency is enhanced and multiphonon relaxation is remarkably reduced due to the lower phonon energy of the resulting alumino-silicate glass.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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