Articolo in rivista, 2020, CPE, 10.1111/jace.16691

Fabrication, microstructure, and optical properties of Yb:Y3ScAl4O12 transparent ceramics with different doping levels

Peng, Yagang; Toci, Guido; Pirri, Angela; Patrizi, Barbara; Hu, Zewang; Wei, Jiabei; Pan, Hongming; Zhang, Xing; Li, Xiaoying; Su, Sha; Vannini, Matteo; Li, Jiang

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, Peoples R China; CNR, INO, Sesto Fiorentino, FI, Italy; IFAC, CNR, Sesto Fiorentino, FI, Italy; CNR, INO, Pisa, Italy; Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang, Jiangsu, Peoples R China

Transparent Yb:Y3ScAl4O12 (Yb:YSAG) ceramics with different ytterbium doping concentrations such as 5, 10, 15, 20 at.% have been successfully fabricated by solid-state reactive sintering. All the obtained ceramics are in dense and homogeneous structure after sintering at 1820 degrees C for 30 hours and with a posttreatment by hot isostatic pressing at 1750 degrees C for 3 hours with 200 MPa pressure. We systematically analyzed the influence of Yb3+ doping concentration on the microstructure and optical properties of the ceramics. The 10 at.% Yb:Y3ScAl4O12 ceramics with a thickness of 3.2 mm show the best transparency as high as 80.9% at 1100 nm. The laser emission of the 10 at.% Yb:YSAG ceramics was tested, resulting in a maximum slope efficiency of 67.6% and a maximum output power of 11.3 W under quasi-continuous wave pump conditions. The tuning range spanned from 990 to 1071 nm.

Journal of the American Ceramic Society 103 (1), pp. 224–234

Keywords

optical properties, transparent ceramics, Yb, Y3ScAl4O12 (Yb, YSAG), ytterbium concentration

CNR authors

Toci Guido, Pirri Angela, Patrizi Barbara, Vannini Matteo

CNR institutes

IFAC – Istituto di fisica applicata "Nello Carrara", INO – Istituto nazionale di ottica