In this paper we report on the preparation and laser performance of transparent 3aL% Yb:Sc2O3 ceramics by reactive sintering of commercially available powders under vacuum followed by hot isostatic pressing (HIP). Combinations of different vacuum sintering temperatures (1650 degrees C and 1750 degrees C) and different HIP treatments (1700 degrees C and 1800 degrees C at 200 MPa) were tested in order to understand how these steps influence the microstructure and thus the optical and lasing properties of the ceramic samples. All the samples showed a good optical quality. The microstructure analysis and the laser tests showed that the vacuum pre-sintering temperature is the key factor determining the quality of the samples and the laser performances. The best values of slope efficiency i.e. eta(L) = 50 % and output power i.e. P-out = 6.62 W were obtained for the sample pre-sintered under vacuum at 1650 degrees C and hot isostatically pressed at 1800 degrees C.

Fabrication and laser performances of Yb:Sc2O3 transparent ceramics from different combination of vacuum sintering and hot isostatic pressing conditions

Toci Guido;Hostasa Jan;Patrizi Barbara;Biasini Valentina;Pirri Angela;Piancastelli Andreana;Vannini Matteo
2020

Abstract

In this paper we report on the preparation and laser performance of transparent 3aL% Yb:Sc2O3 ceramics by reactive sintering of commercially available powders under vacuum followed by hot isostatic pressing (HIP). Combinations of different vacuum sintering temperatures (1650 degrees C and 1750 degrees C) and different HIP treatments (1700 degrees C and 1800 degrees C at 200 MPa) were tested in order to understand how these steps influence the microstructure and thus the optical and lasing properties of the ceramic samples. All the samples showed a good optical quality. The microstructure analysis and the laser tests showed that the vacuum pre-sintering temperature is the key factor determining the quality of the samples and the laser performances. The best values of slope efficiency i.e. eta(L) = 50 % and output power i.e. P-out = 6.62 W were obtained for the sample pre-sintered under vacuum at 1650 degrees C and hot isostatically pressed at 1800 degrees C.
2020
Istituto di Fisica Applicata - IFAC
Istituto di Scienza, Tecnologia e Sostenibilità per lo Sviluppo dei Materiali Ceramici - ISSMC (ex ISTEC)
Istituto Nazionale di Ottica - INO
Hot isostatic pressing
Laser ceramics
Yb-doped sesquioxides laser ceramics
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/367744
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