Simple Broadband Bismuth Doped Fiber Amplifier (BDFA) to Extend O-Band Transmission Reach and Capacity. - Vitaly Mikhailov; Mikhail Melkumov; Daryl Inniss; Aleksandr Khegai; Konstantin Riumkin; Sergei Firstov; Fedor Afanasiev; Man F. Yan; Yingzhi Sun; Jiawei Luo; Gabriel S. Puc; Scott D. Shenk; et al. (OFC, 2019)

O-Band Bismuth-Doped Fiber Amplifier with 67 nm Bandwidth. - Aleksandr Khegai; Yan Ososkov; Sergei Firstov; Konstantin Riumkin; Sergey Alyshev; Alexander Kharakhordin; Elena Firstova; Fedor Afanasiev; Vladimir Khopin; Alexey N. Guryanov; Mikhail Melkumov (OFC, 2020)

O+E Band BDFA with Flattop 116 nm Gain Bandwidth Pumped with 250 mW at 1256 nm. - Aleksandr Khegai; Yan Ososkov; Sergei Firstov; Konstantin Riumkin; Sergey Alyshev; Alexander Kharakhordin; Alexey Lobanov; Alexey N. Guryanov; Mikhail Melkumov (OFC, 2021)