Fabrication, microstructure and optical properties of Yb:LuxY3-xAl5O12 transparent ceramics

Year: 2020

Authors: Feng YG., Xie TF., Chen XP., Toci G., Pirri A., Patrizi B., 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 INO, Consiglio Nazl Ric, Ist Nazl Ott, Via Madonna Piano 10C, I-50019 Sesto Fiorentino, FI, Italy; CNR IFAC, Consiglio Nazl Ric, Ist Fis Applicata Carrara, Via Madonna Piano 10C, I-50019 Sesto Fiorentino, FI, Italy.

Abstract: In this paper, we reported mixed garnet laser ceramic gain media with composition of 15 at.% Yb:LuxY(3-x)Al(5)O(12) (x = 0, 0.75, 1.5, 3.0, Yb:LuYAG) fabricated by the solid state reactive sintering in vacuum. After being sintered at 1850 degrees C for 30 h, all the Yb:LuYAG ceramics have dense microstructure and high optical quality. The in-line transmittances of the 1.6 mm thick ceramics with x = 0, 0.75, 1.5 and 3.0 are 84.8%, 84.1%, 82.4% and 83.4% at 1100 nm wavelength, respectively. The influences of the Lu3+ content on the absorption and emission spectra were discussed. With the increase of Lu3+ content, the crystal field increases, causing a blue shift of position and bigger absorption coefficient of the about 938 nm absorption peaks. The main emission peaks for all Yb:LuYAG ceramics retain at 1030 nm. The samples have shown a high laser emission slope efficiency, near to exceeding 60% in optimized output coupling conditions. The comparable optical properties and excellent thermomechanical qualities mean that the Yb:LuYAG ceramics are promising gain media used for high power laser application.

Journal/Review: OPTICAL MATERIALS

Volume: 110      Pages from: 110478-1  to: 110478-7

More Information: This work 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-SSWJSC022). This activity was partially supported by the Chinese Academy of Science (CAS) -Italian National Research Council (CNR) cooperation agreement for the period 2020-2022, CNR grant number SAC.AD002.041.
KeyWords: Mixed garnet; Laser ceramics; Fabrication; Microstructure; Optical properties
DOI: 10.1016/j.optmat.2020.110478

Citations: 4
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