[1] [1] Soga K, Inoue H, Makishima A. Fluorescence properties of fluorozirconate glasses containing Er3+ ions. J. Lumin., 1993, 55(1):17～24

[2] [2] Weber M J. Optical Properties of Ions in Crystals. eds. Crosswhite H M, Moos H W, New York: Wiley Interscience. 1976. 467～484

[3] [3] Ribeiro S J L, Diniz R E O, Messaddeq Y et al.. Eu3+ and Gd3+ spectroscopy in fluoroindate glasses. Chem. Phys. Lett., 1994, 220(3～5):214～218

[4] [4] Tanabe H, Todoroki S, Hirao K et al.. Phonon sideband of Eu3+ in sodium borate glasses. J. Non-Cryst. Sol., 1990, 122(1):59～65

[5] [5] Judd B R. Optical absorption intensities of rare earth ions. Phys. Rev., 1962, 127(3):750～761

[6] [6] Ofelt G S. Intensities of crystal spectra of rare earth ions. J. Chem. Phys., 1962, 37(3):511～520

[8] [8] Miyakawa T, Dexter D L. Photon sideband, multiphonon relaxation of excited states, and photon-assisted energy transfer between ions in solids. Phys. Rev. (B), 1970, 1(7):2961～2969