[1] [1] V. Dominic, S. MacCormack, R. Waarts et al.. 110 W fiber laser [J]. Electron. Lett., 1999, 35(14):1158～1160

[2] [2] Y. Jeong, J. K. Sahu, D. N. Payne et al.. Ytterbium-doped large-core fiber laser with 1.36 kW continuous-wave output power [J]. Opt. Exp., 2004, 12(25):6088～6092

[4] [4] L. Zenteno. High-power double-clad fiber lasers [J]. J. Lightwave. Technol., 1993, 11(9):1435～1447

[5] [5] G. P. Agrawal. Nolinear Fiber Optics [M]. 2nd ed.. San Diego: Academic Press, 1995

[7] [7] S. D. Jackson. Theoretical characterization of Raman oscillation with intracavity pumping of fiber lasers [J]. IEEE J. Quantum Electron., 2001, 37(5):626～634

[8] [8] M. Rini, I. Cristiani, V. Degiorgio. Numerical modeling and optimization of cascaded cw Raman fiber lasers [J]. IEEE J. Quantum Electron., 2000, 36(10):1117～1122

[9] [9] C-H. Liu, B. Ehlers, F. Doerfel et al.. 810 W continuous-wave and single-transverse-mode fibre laser using 20 μm core Yb-doped double-clad fibre [J]. Electron. Lett., 2004, 40(23):1471～1472

[10] [10] Y. Wang, C-Q. Xu, H. Po. Analysis of Raman and thermal effects in kilowatt fiber lasers [J]. Opt. Commun., 2004, 242:487～502

[11] [11] R. Paschotta, J. Nilsson, A. C. Tropper et al.. Ytterbium-doped fiber amplifiers [J]. IEEE J. Quantum Electron., 1997, 33(7):1049～1056

[14] [14] N. S. Platonov, D. V. Gapontsev, V. P. Gapontsev et al.. 135 W CW fiber laser with perfect single mode output [C]. CLEO, 2002, May, 19～24