Bismuth-Doped Optical Fibers for the Telecommunication L and U Bands: Effect of Laser and Thermal Treatment on Gain Characteristics. - Evgeny M. Dianov; Sergei Firstov; Sergey Alyshev; Alexander Kharakhordin; Konstantin Riumkin; Mikhail Melkumov; Vladimir Khopin; Alexey N. Guryanov (ECOC, 2018)

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)