Fabrication, microstructures, and optical properties of Yb:Lu2O3 laser ceramics from co-precipitated nano-powders

Year: 2020

Authors: Liu ZY., Toci G., Pirri A., Patrizi B., Feng YG., Wei JB., Wu F., Yang ZX., Vannini M., Li J.

Autors Affiliation: Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Transparent Optofunct Inorgan Mat, Shanghai 201899, Peoples R China; Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China; CNR, Ist Nazl Ott, INO, I-50019 Sesto Fiorentino, Fi, Italy; CNR, Ist Fis Appl N Carrara, IFAC, I-50019 Sesto Fiorentino, Fi, Italy; Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China.

Abstract: The Yb:Lu2O3 precursor made up of spherical particles was synthesized through the co-precipitation method in the water/ethanol solvent. The 5 at% Yb:Lu2O3 powder is in the cubic phase after calcination at 1100 degrees C for 4 h. The powder also consists of spherical nanoparticles with the average particle and grain sizes of 96 and 49 nm, respectively. The average grain size of the pre-sintered ceramic sample is 526 nm and that of the sample by hot isostatic pressing grows to 612 nm. The 1.0 mm-thick sample has an in-line transmittance of 81.6% (theoretical value of 82.2%) at 1100 nm. The largest absorption cross-section at 976 nm is 0.96×10(-20) cm(2) with the emission cross-section at 1033 nm of 0.92×10(-20) cm(2) and the gain cross sections are calculated with the smallest population inversion parameter beta of 0.059. The highest slope efficiency of 68.7% with the optical efficiency of 65.1% is obtained at 1033.3 nm in quasi-continuous wave (QCW) pumping. In the case of continuous wave (CW) pumping, the highest slope efficiency is 61.0% with the optical efficiency of 54.1%. The obtained laser performance indicates that Yb:Lu2O3 ceramics have excellent resistance to thermal load stresses, which shows great potential in high-power solid-state laser applications.

Journal/Review: JOURNAL OF ADVANCED CERAMICS

Volume: 9 (6)      Pages from: 674  to: 682

More Information: This study was supported by the National Key R&D Program of China (Grant No. 2017YFB0310500), the National Natural Science Foundation of China (Grant No. 61575212), and the Key Research Project of the Frontier Science of the Chinese Academy of Sciences (No. QYZDB-SSW-JSC022).
KeyWords: Yb; Lu2O3 transparent ceramics; co-precipitated nano-powder; spectroscopic properties; laser performance; hot isostatic pressing
DOI: 10.1007/s40145-020-0403-8

ImpactFactor: 6.707
Citations: 40
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