2.0-μm emission and energy transfer of Ho3+/Yb3+ co-doped LiYF4 single crystal excited by 980 nm*
Yang Shuoa), Xia Hai-Pinga)†, Jiang Yong-Zhanga), Zhang Jia-Zhonga), Jiang Dong-Shenga), Wang Chenga), Feng Zhi-Ganga), Zhang Jiana), Gu Xue-Meia), Zhang Jian-Lia), Jiang Hao-Chuanb), Chen Bao-Jiuc)
       
Fluorescence decay curves of LFHY2, LFHY4, LFHY6, LFHY8 at 1019 nm by 940-nm excitation. Inset shows the relationship between energy transfer rate and ion concentration.