[1] Mears R J, Reekie L, Jauncey, et al. Low-noise erbium-doped fiber anplifier at 1.54 μm [J]. Electron Lett., 1987,23(19): 1026-1028.
[2] Desuruive E, Simpson J R, Becher P C. High-gain erbium-doped Taveling-wave fiber amplifier [J]. Optics Lett.,1987, 12(11): 888-890.