[3] Hill K O, Metlz G. Fiber bragg grating technology fundamentals and overview. J. Lightwave Technol., 1997, 15(8): 1263~1276
[4] Liaw Shien-Kuei, Lee Chien-Chung, Ho Keang-Po et al.. Power equalized wavelength-selective fiber lasers using fiber Bragg grating. Opt. Commun., 1998, 155(4~6): 255~259
[5] Pask H M, Carman R J, Hanna D C et al.. Ytterbium-doped silica fiber lasers: Versatile sources for the 1~1. 2 mm region. IEEE J. Sel. Top. Quant. Electron., 1995, 1(1): 2~13
[9] Fu Chengpeng, Li Yigang, Liu Weiwei et al.. The research on conversion efficiency of double-clad fiber laser. Proc. SPIE, 2000, 4225: 160~163
[10] Mortimore D B. Fiber loop reflecters. J. Lightwave Technol., 1988, 6(7): 1217~1224