[1] [1] T. Ohisuki, S. Honkanen, S. I. Najafi et al.. Gain characteristics of a high concentration Er3+-Doped phosphate glass waveguide. J. Appl. Phys., 1995, 78 (6):3617～3621

[4] [4] Jiang Shi bin, Gualtiero Nunzi-Conti, Michael Myers et al.. New-doped phosphate glass for ion-exchanged waveguide amplifiers. Opt. Engng., 1998, 37(12):3282～3286

[5] [5] Ε. Snonks. Cooperative upconversion in erbium-implanted soda-lime silicate glass optical waveguides. J. Opt. Am. (B), 1995, 12(8): 1468～1474

[6] [6] Fabrizio Di Pasquale, Maurizio Zoboli. Analysis of Erbium-Doped Waveguide Amplifiers by a Full-Vectorial Finite-Element Method. IEEE J. Lightwave Technol., 1993, 11 (10):1565～1573

[7] [7] Pasquale F. Di, Federighi M. Improved gain characteristics in high-concentration /Yb3+ codoped waveguided amplifiers. IEEEJ. Quant. Electron., 1994, QE-30(9): 2127～2131

[8] [8] S. Honkanen, T. Ohtsuki, S. Jiang. High Er concentration phosphate glasses planar waveguide amplifiers. Proc. SPIE, 1997, 2996:32～40