Fabrication of er-doped sesquioxide laser ceramics and their laser performance
In this work, detailed studies on the powder synthesis, microstructure evolution and sintering strategy for sesquioxide transparent ceramics were conducted. The combination of chemical co-precipitation method and suitable dispersant - poly acrylic acid, provided a good solution to fabricate the...
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| Format: | Thesis-Doctor of Philosophy |
| Language: | English |
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Nanyang Technological University
2023
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| Online Access: | https://hdl.handle.net/10356/167936 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | In this work, detailed studies on the powder synthesis, microstructure evolution and sintering strategy for sesquioxide transparent ceramics were conducted.
The combination of chemical co-precipitation method and suitable dispersant - poly acrylic acid, provided a good solution to fabricate the initial powders with low level agglomeration, good dispersity and high sinterability.
The influences of air pre-sintering on the fabrication of high optical quality Yb3+-doped yttria laser ceramics were experimentally investigated. High quality 3 at. % Yb3+:Y2O3 laser ceramics with small average grain size, uniform microstructures and good laser performance were fabricated.
Through optimizing the powder quality and sintering strategy, high quality eye-safe 0.25 at.% Er:Y2O3 laser ceramics were fabricated and laser oscillation at 1640 nm was firstly realized. CW lasing performance of the ceramics was characterized, which showed a maximum output power of 6.0 W and a slope efficiency of 23.2%. |
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