[4] Hideur A,Chartier T,Ozkul C. All-fiber tunable ytterbium-doped double-clad fiber ring laser. Opt Lett, 2001,26(14): 1054~1056
[5] Alvarez-Chavez J A,Offerhaus H L,Nilsson J,et al. High-energy,high-power ytterbium-doped Q-switched fiber laser.Opt Lett, 2000,25(1):37~39
[6] Hideur A,Chartier T,Brunel M,et al. Mode-lock,Q-switch and CW operation of an Yb-doped double-clad fiber ring laser. Opt Commun,2001,198(10):141~146
[7] Bonfrate G,Vaninetti F,Negrisolo F. Single-frequency MOPA Er3+ DBR fiber laser for WDM digital telecommunication systems.IEEE Photon Tech Lett,1998,10(8):1109~1111
[8] Ball G A, Morey W W. Continuously tuneable single-mode erbium fiber laser.Opt Lett,1992,17(6):420~422
[11] Mizunami T,Djambova T V,Niiho T, et al. Bragg grating in multimode and few-mode optical fibers.Journal of Lightwave Technology,2000,18(2):230~235
[12] Allain J Y,Bayon J F,Monerie M,et al. Ytterbium-doped silica fiber laser with intracore bragg grating operating at 1.02 μm.Electron Lett,1993,29(3):309~310