Diode-pumped passively mode-locked sub-picosecond Yb:LuAG ceramic laser
Zhu Jiang-Feng1, †, Liu Kai1, Jiang Li2, ‡, Wang Jun-Li1, Yang Yu1, Wang Hui-Bo1, Gao Zi-Ye1, Xie Teng-Fei2, Chao-Yu Li2, Pan Yu-Bai2, 4, Wei Zhi-Yi3
       

(color online) Gain cross sections of (a) 2.5 at.% Yb:LuAG and (b) 15 at.% Yb:LuAG transparent ceramics.