[9] Shi Liansheng, Wen Meng, Qian Yannan, . Tm: Yb: Er: LiTaO3 upconversion properties of white light[J]. Journal of the Chinese Society of Rare Earths, 29, 78-81(2011).
[12] Xing Lili. Study on the upconversion white light properties of Ho: Yb: Tm: LiNbO3 polycrystals[D]. Harbin: Harbin Institute of Technology, 2010: 3842