[1] Giles C R. Modeling erbium-doped fiber amplifier. Journal of Lightwave Technology, 1991,9(2):271～283

[2] Feced R, Alegria C, Zervas M N, et al. Acoutoptic attenuation filters based on tapered optical fibers. IEEE J Selected Topics in Quantun Electron, 1999, 5(13):1278～1288

[3] Yun S K, Lee B W, Kim H K, et al. Dynamic erbium-doped fiber amplifier based on active gain flattening with a fibre acoustooptic tunable filter. IEEE Photon Technol Lett, 1999,11(10):1229～1231

[4] Liaw S K, Ho K P, Chi S. Dynamic power-equalized EDFA module based on strain tunable fibre Bragg gratings. IEEE Photon Technol Lett, 1999, 11(7):797～799

[5] Wysocki P F, Judkins J B, Espindola R P, et al. Broad-band erbium-doped fibre amplifier flattened beyond 40 nm using long-period grating filter. IEEE Photon Technol Lett, 1997,19(10):1343～1345

[6] Pandit M K, Chiang K S, Chen Z H, et al. Tunable long-period fibre gratings for EDFA gain and ASE equalization. Microwave and Opt Technol Lett, 2000,25(2):181～184

[7] Davis D D, Gaylord T K, Glytsis E N, et al. Long period fibre grating fabrication with focused CO2 laser pulses. Electron Lett, 1998, 34(3):302～304

[8] Davis D D, Gaylord T K, Glytsis E N, et al. CO2 laser-induced long-period fibre gratings: spectral characteristics, cladding modes and polarization independce. Electron Lett, 1998, 34(14):1416～1417