Nanocrystalline ZrO2-doped active optical fibers for fiber lasers operating at 2 mu m

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F21%3A00555639" target="_blank" >RIV/67985882:_____/21:00555639 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1117/12.2589127" target="_blank" >https://doi.org/10.1117/12.2589127</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1117/12.2589127" target="_blank" >10.1117/12.2589127</a>

Result language
angličtina
Original language name
Nanocrystalline ZrO2-doped active optical fibers for fiber lasers operating at 2 mu m
Original language description
In this work, phase-separated fibers of the system SiO2-ZrO2 doped by thulium and holmium ions were prepared by modified solution-doping method combined with MCVD. The ZrO2 concentration in both fibers was approx. 3 mol. %. The rare-earth ion concentrations were 270 and 740 ppm, respectively. The presence of ZrO2-based nanoparticles in the optical fiber preforms was confirmed by scanning electron microscope (SEM). The background losses of the fibers were in the range of 0.1 - 0.6 dB/m. The fibers exhibited strong emission in the near-infrared region thanks to 4f-4f transitions of rare-earth ions. The photoluminescence decay of both fibers exhibited double exponential character, most likely due to the incorporation of rare-earth ions in different optically active sites, i.e. ZrO2-based nanoparticles and grain boundaries or amorphous silica matrix. The fibers were tested as active mediums in fiber laser setup. The thulium-doped fiber exhibited threshold for laser operation of 233 mW and slope efficiency of 72.7 %. The holmium doped fiber failed to manifest lasing properties. An improved laser performance may be achieved by higher proportion of rare-earth ions incorporating in the favorable environment of the nanoparticles
Czech name
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Czech description
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Project
<a href="/en/project/GA19-03141S" target="_blank" >GA19-03141S: Research of novel geometries and layouts of double-clad rare-earth-doped fibers for high power fiber lasers</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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