Scientific Results

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

KeyWords: Yb; Lu2O3 transparent ceramics; co-precipitated nano-powder; spectroscopic properties; laser performance; hot isostatic pressing
DOI: 10.1007/s40145-020-0403-8

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