Erbium and ytterbium co-doped transparent oxyfluoride glass-ceramics optical fibers

Elwira Czerska; Krzysztof Wiśniewski; Elżbieta Augustyn; Czesław Koepke; Radosław Lisiecki; Mirosława Kępińska; Michał Żelechower

doi:10.1117/12.2271623

22 August 2017 Erbium and ytterbium co-doped transparent oxyfluoride glass-ceramics optical fibers

Elwira Czerska, Krzysztof Wiśniewski, Elżbieta Augustyn, Czesław Koepke, Radosław Lisiecki, Mirosława Kępińska, Michał Żelechower

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Proceedings Volume 10453, Third International Conference on Applications of Optics and Photonics; 104530F (2017) https://doi.org/10.1117/12.2271623
Event: Third International Conference on Applications of Optics and Photonics, 2017, Faro, Portugal

Abstract

According to the earlier author’s papers, the erbium/ytterbium co-doped oxyfluoride glass-ceramics fibers should demonstrate better 1550 nm emission under 488/515/980 nm excitation (the erbium Er³⁺ ion transition ⁴I_13/2→⁴I_15/2) than corresponding glass fibers (the batch composition 48SiO₂11Al₂O₃-7Na₂CO₃-10CaO-10PbO-12PbF₂- 1.5/0.6YbF₃-0.5/0.2ErF₃). Glass fibers provided as a core of standard multimode waveguide (the diameter of 62 μm) have been drawn with the mini-tower to the diameter between 50 μm and 80 μm, then annealed in the two-step regime (580°C/1h – nucleation of nano-crystals; 760oC/15/30 min – nano-crystals growth). This kind of heat treatment ensures the transparent glass-ceramics fibers with the microstructure of homogeneously distributed nano-crystals (lead, erbium and ytterbium enriched cubic fluorite-like crystals and hexagonal PbF₂ crystals) embedded in a glassy host. Their transmission covers the range of 80-90% and seems to be sufficient with respect to their provided limited length (~2m). The luminescence intensity for glass-ceramics fibers at 1530 nm is higher than that of respective glass fibers and the lifetimes of the erbium ion excited state ⁴I_13/2 are of the same order (~5 ms). In that context the glass-ceramics fibers discussed above seem to be promising candidates for cores of fiber lasers at the 1550 nm band.

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Elwira Czerska, Krzysztof Wiśniewski, Elżbieta Augustyn, Czesław Koepke, Radosław Lisiecki, Mirosława Kępińska, and Michał Żelechower "Erbium and ytterbium co-doped transparent oxyfluoride glass-ceramics optical fibers", Proc. SPIE 10453, Third International Conference on Applications of Optics and Photonics, 104530F (22 August 2017); https://doi.org/10.1117/12.2271623

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KEYWORDS

Erbium

Glasses

Ions

Luminescence

Optical fibers

Ytterbium

Crystals

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