Influence of annealing on microstructures and properties of Yb:Lu2O3 transparent ceramics

Year: 2024

Authors: Liu ZY., Feng YG., Toci G., Pirri A., Patrizi B., Vannini M., Li J.

Autors Affiliation: Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha, Peoples R China; Chinese Acad Sci, Shanghai Inst Ceram, Transparent Ceram Res Ctr, Shanghai, Peoples R China; Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing, Peoples R China; Henan Univ Technol, Sch Mat Sci & Engn, Zhengzhou, Henan, Peoples R China; CNR, Ist Nazl Ottica, Sesto Fiorentino, FI, Italy; CNR, Ist Fis Applicata N Carrara, Sesto Fiorentino, Fi, Italy; Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China; Chinese Acad Sci, Shanghai Inst Ceram, Transparent Ceram Res Ctr, Shanghai 201899, Peoples R China.

Abstract: In this work, 5at.% Yb:Lu2O3 transparent ceramics were air-annealed at different temperatures to eliminate oxygen vacancies for laser performance improvement. The influence of annealing temperature on microstructures, optical quality, and laser performance was investigated comprehensively. The ceramics HIP (Hot isostatic pressing) post-treated at 1750 degrees C and annealed above 1100 degrees C show a significant optical quality decrease due to residual pore expansion, and the ceramic sample annealed at 900 degrees C shows better laser performance than others. The maximum output of 2.88 W was obtained at 1033.3 nm with a slope efficiency of 37.4% under a quasi-continuous wave (QCW) mode. Note that 5at.% Yb:Lu2O3 transparent ceramics HIP post-treated at 1550 degrees C still keep good transparency even when being annealed at 1300 degrees C due to less residual compressed pores. The highest slope efficiency is about 73.8% with a maximum output power of 2.84 W under QCW. Fine-grained and dense Yb:Lu2O3 transparent ceramics could be annealed at higher temperatures to eliminate oxygen vacancies more thoroughly to improve laser performance.

Journal/Review: JOURNAL OF THE AMERICAN CERAMIC SOCIETY

Volume: 107 (3)      Pages from: 1974  to: 1984

More Information: This work was supported by the National Key R&D Program of China (grant number 2022YFB3605704), the International Partnership Program of Chinese Academy of Sciences (grant number 121631KYSB20200039), the International Cooperation Project of Shanghai Science and Technology Commission (No. 20520750200), National Center for Research and Development (Contract No. WPC2/1/SCAPOL/2021) and the Joint Research Project between Chinese Academy of Sciences and National Research Council (CAS-CNR) 2020-2022. This work was also supported by the Scientific Research Fund of Hunan Provincial Education Department (No. 22C0140).
KeyWords: annealing temperature; laser performance; microstructures; transparent ceramics; Yb:Lu2O3
DOI: 10.1111/jace.19573

Citations: 4
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