Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 103, Issue 3, Pages 1819-1830Publisher
WILEY
DOI: 10.1111/jace.16873
Keywords
microstructure; optical properties; Tm; YSAG; transparent ceramics
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Funding
- National Natural Science Foundation of China [61575212]
- National Key R&D Program of China [2017YFB0310500]
- Key Research Project of the Frontier Science of the Chinese Academy of Sciences [QYZDB-SSW-JSC022]
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Transparent 4 at.% Tm:Y3ScAl4O12 (Tm:YSAG) laser ceramics were fabricated by solid-state reaction combined with vacuum sintering method. The 4 at.% Tm:YSAG ceramic sample sintered at 1800 degrees C for 30 hours possesses homogenous microstructure and excellent optical properties, showing a transmittance of 79.3% at 2000 nm. The absorption and emission spectra of the Tm:YSAG ceramics are studied and compared with those of 4 at.% Tm:Y3Al5O12 ceramics. The introduction of Sc3+ greatly affects the energy levels of the Tm3+, causing the disappearance and degeneration of some absorption and emission peaks in the middle infrared region. The laser performance of the 4 at.% Tm:YSAG ceramics is also tested in the Quasi-continuous-wave (QCW) mode by pumping with a 790 nm laser diode (LD). A maximum laser output power of 0.54 W with a slope efficiency of 4.8% is achieved, which is the first laser output for Tm:YSAG ceramics.
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