[1] WU Zh L,LOU Q H,DONG J X et al.Research for the side-coupling properties of micro-prism and double-cladding fiber[J].Laser Technology,2005,29(5):533～535(in Chinese).
[2] WEI W L,OU P,YAN P et al.Side-pumping coupler technology for double-clad fiber[J].Laser Technology,2004,28(2):116～120(in Chinese).
[3] REICHEL V,MORL K,UNGER S et al.Fiber-laser power scaling beyond the 1-kilowatt level by Nd:Yb co-doping[J].Proc SPIE,2005,5777:404～407.
[4] HARDY A,ORON R.Signal amplification in strongly pumped fiber amplifiers[J].IEEE J Q E,1997,33(3):307～313.
[5] WANG Y,XU Ch Q,PO H et al.Analysis of Raman and thermal effects in kilowatt fiber lasers[J].Opt Commun,2004,242:487～502.
[6] KINCAID D,CHENEY W.Numerical analysis:mathematics of scientific computing[M].3th ed,Beijing:China Machine Press,2003.572～589(in Chinese).
[7] KELSON I,HARDY A.Strongly pumped fiber lasers[J].IEEE J Q E,1998,34(9):1570～1577.
[8] PASCHOTTA R,NILSSON J,TROPPER A C et al.Ytterbium-doped fiber amplifiers[J].IEEE J Q E,1997,33(7):1049～1056.
[9] WEBER M J,LYNCH J E,BLACKBURN D H et al.Dependence of the stimulated emission cross section of Yb3+ on host glass composition[J].IEEE J Q E,1983,QE19(10):1600～1608.
[10] URQUHART W P,LAYBOURN P J.Effective core area for stimulated Raman scattering in single-mode optical fibers[J].IEE Proceedings,1985,132(4):201～204.