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)
       
Absorption spectra of Ho3+ single-doped and Ho3+/Yb3+ co-doped LiYF4 crystal.