M. Yamada et al., GAIN-FLATTENED TELLURITE-BASED EDFA WITH A FLAT AMPLIFICATION BANDWIDTH OF 76 NM, IEEE photonics technology letters, 10(9), 1998, pp. 1244-1246
We describe a tellurite-based Er3+-doped fiber amplifier (EDFA) with a
flat amplification bandwidth of 76 nm and a noise figure of less than
7 dB, Furthermore, a parallel-type amplifier composed of this EDFA an
d a 1.45-mu m-band Tm3+-doped fluoride fiber amplifier achieved a flat
amplification bandwidth of 113 nm.