Optical properties of Mg
2+
, Yb
3+
, and Ho
3+
tri-doped LiNbO
3
crystals
Dai Li
1, †
, Liu Chun-Rui
1
, Tan Chao
1
, Yan Zhe-Hua
1
, Xu Yu-Heng
2
(color online) Mg
concentration dependent up-converted intensity of Mg:Yb:Ho:LiNbO
3
crystals.
