[1] [1] A. Polman. Exciting erbium doped planar optical amplifier materials. Proc. SPIE, 2000, 3942:2～11

[2] [2] Y. C. Yan, A. J. Faber, H. de Waal. Erbium doped phosphate glass wav^uide on silicon with 4.1 dg/cm gain at 1.535 μm. Appl. Phys. Lett., 1997, 71(20):2922～2924

[3] [3] S. Pelli, M. Brenci, M. Fossi et al.. Optical and spectroscopic characterization of Er/ Yb-activated planar waveguides. Proc. SPIE f 2000, 3942:139～145

[5] [5] M. P. Hehlen, Ν. J. Cockroft, Τ. R. Gosnell. Spectroscopic properties of and Yb3+ doped soda lime silicate and aluminosilicate glasses. Phys. Rev. Β, 1997, 56(15):9302～9318