1Auzel F. Materials and Devices Using Double Pumped Phosphors with Energy Transfer. Proceedings of the IEEE , 1973 , 61(6):758-787.
2PollnauM, Gamelin D R, Luthi S R, et al. Power dependence of upconversion luminescence in lanthanide and transition - metal - ion systems[J]. Phys. Rev. B, 2001, 61 (5) :3337-3346.
3Downing E, Hesselink L, Raison J , et al. A three - color, solid - state, three - dimensional display[J]. Science, 1996, 273:1185-1189.
4Yi G S, Sun B Q, Yang F Z, et al. Synthesis and characterization of highly efficiency nanocrystal up- conversion phos - phors. ytterbium and erbium codoped lanthanum molybdate[J]. Chem. Mater. , 2002, 14: 2910-2914.
5Kapoor R, Friend C S, BiswasA, et al. Highly efficient infrared2to2visible energy upconversion in Era+ : Y2O3[J]. Opt. Lett. 2000, 25 (5) : 338-340.
9Higuchi H , Takahashi M , Kawamoto Y. Optical transition and frequency upconversion emission of Er3+ ions in Ga2S3-GeS2 -La2S3glasses[J]. J .Appl. Phys. ,1998 , 83 (1) :19-27.
10Grubb S G,Bennett KWand Cannon R S ,et al . CW room temperature blue Upconversion Fiber Laser[J]. Electronics Lett. , 1992 ,28 :1243-1244.
