Zhang Long, Zhang Junjie, Qi Changhong, et al. Energy transfer and upconversion in Tm3+-Yb3+ co-doped AlF3-based fluoride glass [J]. Chin. J. Lasers (中国激光), 2000, 27 (5):459-465 (in Chinese).[2] Li Chenxia, Kang Juan, Zheng Fei, et al. Upconversion luminescence of Ho3+/Yb3+ codoped oxyfluoride silicate glass ceramics [J]. Chin. J. Lasers (中国激光), 2009, 36 (5):1184-1189 (in Chinese).[3] Li Chenxia, Xu Shiqing, Ye Renguang, et al. Optical properties of Eu2+ /Eu3+ doped SiO2-Al2O3-ZnO-K2CO3 glass-ceramic [J]. Acta Optica Sinica (光学学报), 2010, 30 (4):1084-1087 (in Chinese).[4] Li Panlai, Yang Zhiping, Wang Zhiun, et al. Luminescence characteristics of red LiM(M=Ca, Sr, Ba)Bo3 ∶ Re3+(Re=Eu,Sm) phosphor [J]. Chin. J. Lumin. (发光学报), 2009, 30 (2):179-183 (in Chinese).[5] Sang Shiyun, Wang Xifeng, Xia Wei, et al. Preparation and encapsulation characteristics of silicate-based phosphor for white-light-emitting LED[J]. Chin. J. Lumin. (发光学报), 2009, 30 (4):503-508 (in Chinese).[6] Gao Fei, Liang Lifang, Guo Chongfeng. Preparation and luminescence of red light-emitting phosphors based on Li3Ba2Ln3-x(MoO4)4 by sol-gel method [J]. Chin. J. Lumin. (发光学报), 2009, 30 (5):610-616 (in Chinese).[7] Hizhnyi Y, Oliynyk A, Gomenyuk O, et al. Electronic structure and optical properties of Ti-doped phosphate crystals [J]. Materials Science and Engineering B, 2007, 144 (1):7-10.[8] Meng X G, Tanaka K. Intense greenish emission from d0 transition metal ion Ti4+ in oxide glass [J]. Appl. Phys. Lett., 2007, 90 (5):051917-1-3.[9] Li Chengyu, Su Qinag. A new blue phosphorescent glass-ceramic:rare-earth-dioped calcium aluminoborate [J]. J. Alloys and Compounds, 2006, 408-412 :875-878.[10] Sennaroglu A. Broadly tunable Ti-doped solid-state lasers in the near infrared and visible [J]. Progress in Quantum Electronics, 2002, 26 (6):287-352.[11] Andrade L H C, Lima S M. Long fluorescence lifetime of Ti3+-doped low silica calcium aluminosilicate glass [J]. Phys.Rev. Lett., 2008, 100 (2):027402-1-4.[12] Sato T, Shirai M, Tanaka K, et al. Strong blue emission from Ti-doped MgAl2O4 crystals [J]. J. Lumin., 2005, 114 (2):155-161.[13] Avram N M, Brik M G, Avram C N, et al. Energy levels of transition metal ions in laser Tiystals: Tiystal field analysis and electron-phonon interaction [J]. Condensed Matter, 2006, 51 (1-2):151-175.[14] Kumar M, Uniyal A, Chauhan A P S, et al. Optical absorption and fluorescent behaviour of titanium ions in silicate glasses [J]. Boll. Mater. Sci., 2003, 26 (3):335-341.[15] Hmmerich U, Shen Y, Bray K. High-pressure luminescence studies of Ti-doped laser materials [J]. J. Lumin., 1997, 72-74 :139-140.[16] Angert V B, Borodin V I, Garmash V M, et al. Lasing due to impurity color centers in yttrium aluminum garnet crystals at wavelengths in the range 1.35~1.45 m [J]. Sov. J. Quantum Electron., 1988, 18 (1):73-74.[17] Jia W Y, Liu H M, Jaffe S, et al. Spectroscopy of Ti3+ and Ti ions in forterite [J]. Phys. Rev. B, 1991, 43 (7):5234-5242.