[1] Nilsson J, Sahu J K, Jeong Y, et al. High power fiber lasers: new developments.SPIE,2003,4974: 50～59
[3] Dominic V, MacCormack S, Waarts R, et al. 110 W fibre laser.Electron Lett, 1999, 34(14):1158～1160
[4] Platonov N S, Gapontsev D C, Gapontsev V P, et al. 135 W cw fiber laser with perfect single mode output. OSA Trends in Optics and Photonics-Conf. on Lasers and Electro-optics, OSA Tech. Dig., Washington, DC, 2002,73:CPDC3
[5] Limpert J, Liem A, Hfer S, et al. 150W Nd/Yb codoped fiber laser at 1.1 μm. OSA Trends in Optics and Photonics -Conf. on Lasers and Electro-optics. OSA Tech. Dig., Washington, DC, 2002,73:590～591
[6] Alam S U, Turner P W, Grudinin A B, et al. High-power cladding pumped Erbium-Ytterbium co-doped fiber laser. Southampton Photonics, 2002.1～5
[7] Nisson J, Alam S U, Alvarez-Chavez J A, et al. High-power and tunable operation of erbium-ytterbium Co-doped cladding-pumped fiber lasers. J Quantum Electron, 2003,39(8):987～994
[9] Pasquale F D. Modeling of highly-efficient grating- feedback and fabry-perot Er3+-Yb3+ co-doped fiber lasers.IEEE J Quantum Electron, 1996,32(2):326～332
[10] Dong S F, Zhao S H, Zhan S B, et al. Operation principles and numerical analysis of double-cladding erbium-ytterbium co-doped optical fiber amplifiers.SPIE, 2002,4914:28～36
[11] Federighi M,Pasquale F D. The effect of pair-induced energy transfer on the performance of silica waveguide amplifiers with high Er3+/Yb3+ concentrations. IEEE Photon Technol Lett, 1995,7(3):303～305
[12] Pasquale F D,Federighi M. Improved gain characteristics in high-concentration Er3+/Yb3+ codoped glass waveguide amplifiers. IEEE J Quantum Electron,1994,30(9):2127～2131
[13] Karásek M. Optimum design of Er3+-Yb3+ codoped fibers for large-signal high-pump-power applications.IEEE J Quantum Electron, 1997,33(10):1699～1705
[14] Pask H M, Carman R J, Hanna D C, et al. Ytterbium- doped silica fiber lasers: versatile sources for the 1.2 μm region. IEEE J Sel Top in Quantum Electron,1995,1(1):2～13
[15] Bedo S, Luthy W,Weber H P. The effective absorption coefficient in double-clad fibres.Opt Commun, 1993,99(5,6):331～335
[16] Kelson I,Hardy A. Optimization of strongly pumped fiber lasers.J Lightwave Technol, 1999,17(5): 891～897
