Microstructure, absorption and luminescence of Co2+:ZnAl2O4 transparent ceramics: effect of the sintering additive

Alexander Belyaev; Liza Basyrova; Maxim Lelet; Stanislav Balabanov; Mikhail Baranov; Olga Dymshits; Pavel Loiko

doi:10.1117/12.2552968

1 April 2020 Microstructure, absorption and luminescence of Co²⁺:ZnAl₂O₄ transparent ceramics: effect of sintering additive

Alexander Belyaev, Liza Basyrova, Maxim Lelet, Stanislav Balabanov, Mikhail Baranov, Olga Dymshits, Pavel Loiko

Author Affiliations +

Proceedings Volume 11357, Fiber Lasers and Glass Photonics: Materials through Applications II; 113570E (2020) https://doi.org/10.1117/12.2552968
Event: SPIE Photonics Europe, 2020, Online Only

Abstract

Transparent ceramics of cobalt-doped zinc aluminium spinel (gahnite), Co²⁺:ZnA₂O₄, are synthesized by hot pressing at 1520 °C for 4 h in the presence of zinc fluoride, ZnF₂, as a sintering additive. The effect of the ZnF₂ content (3–10 wt%) on the microstructure, Raman spectra, optical absorption and luminescence of ceramics is studied. The ceramics feature clean grain boundaries, the absence of pores and a narrow grain size distribution (mean grain size: 70-100 μm) resulting in high in-line transparency close to the theoretical limit. The obtained ceramics are suitable for fabrication of saturable absorbers of erbium lasers.

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Alexander Belyaev, Liza Basyrova, Maxim Lelet, Stanislav Balabanov, Mikhail Baranov, Olga Dymshits, and Pavel Loiko "Microstructure, absorption and luminescence of Co²⁺:ZnAl₂O₄ transparent ceramics: effect of sintering additive", Proc. SPIE 11357, Fiber Lasers and Glass Photonics: Materials through Applications II, 113570E (1 April 2020); https://doi.org/10.1117/12.2552968

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