| [1] | FERMANN M E.Single mode excitation of multimode fibers with ultrashort pulse[J].Opt Lett,1998,23(1):52-56. |
| [2] | GHATAK A K,GOYAL I C,JINDAL R.Design of waveguide refractive index profile to obtain flat modal field[J].SPIE,1998,3666:40-44. |
| [3] | DAWSON J W,BEACH R J,JOVANOVIC I,et al.Large flattened mode optical fiber for reduction of nonlinear effects in optical fiber lasers[J].SPIE,2004,5335:132-135. |
| [4] | ZHAO Ch J,PENG R W,TANG Zh X,et al.Design and analysis of a kind of large flattened mode optical fiber[J].Chinese Physics,2006,15(7):1838-1842. |
| [5] | ZHAO Ch J,PENG R W,TANG Zh X,et al.Modal fields and bending loss analyses of three-layer large flattened mode fibers[J].Opt Commun,2006,266(1):175-180. |
| [6] | HOTOLEANU M,SöDERLUND M,HOFFMAN H J,et al.Coiling effects on high order mode suppression of a radially doped LMA fiber[J].SPIE,2007,5485:1247-1256. |
| [7] | POOLE S B,PAYNE D N,FERMANN M E.Fabrication of low-loss optical fibers containing rare-earth ions[J].Electron Lett,1985,21(17):737-738. |
| [8] | ZENTENOL.High-powerdouble-cladfiberlasers[J].Journal of Lightwave Technology,1993,11(9):1435-1446. |