Simple Broadband Bismuth Doped Fiber Amplifier (BDFA) to Extend O-band Transmission Reach and Capacity
White Paper
V. Mikhailov, M.A. Melkumov, D. Inniss, A.M. Khegai, K.E. Riumkin, S.V. Firstov, F. V. Afanasiev, M.F. Yan, Y. Sun, J. Luo, G.S. Puc, S.D. Shenk, R.S. Windeler, P.S. Westbrook, R.L. Lingle, E.M. Dianov, D.J. DiGiovanni
In this paper we present a simple single-stage Bi-doped silica fiber amplifier with more than 80 nm 6-dB gain bandwidth. The gain peak can be flexibly centered over 1305-1325 nm by pump wavelength selection. The amplifier has up to 19 dB gain, 20 dBm output power, 25% power conversion efficiency (PCE) and 5 dB noise-figure, similar to an EDFA of the same complexity. The amplifier can extend 425 Gb/s 400GBASE-LR-8 transmission (LAN WDM 8Å~26.6 Gbaud/s PAM-4 channels) to 50 km distance with 6Å~10-5 BER, below KP4-FEC limit (2.4Å~10-4 BER). We also showed that 4 long wavelength channels can be transmitted up to 81.5 km with BER 3Å~10-5.