title: Seven-core erbium-doped double-clad fiber amplifier pumped simultaneously by side-coupled multimode fiber.
abstract: We demonstrate a seven-core erbium-doped fiber amplifier in which all the cores were pumped simultaneously by a side-coupled tapered multimode fiber. The amplifier has multicore (MC) MC inputs and MC outputs, which can be readily spliced to MC transmission fiber for amplifying space division multiplexed signals. Gain over 25 dB was obtained in each of the cores over a 40-nm bandwidth covering the C-band.
authors.forename: Kazi S
authors.initials: KS
authors.lastname: Abedin
authors.forename: John M
authors.initials: JM
authors.lastname: Fini
authors.forename: Taunay F
authors.initials: TF
authors.lastname: Thierry
authors.forename: Benyuan
authors.initials: B
authors.lastname: Zhu
authors.forename: Man F
authors.initials: MF
authors.lastname: Yan
authors.forename: Lalit
authors.initials: L
authors.lastname: Bansal
authors.forename: Frank V
authors.initials: FV
authors.lastname: Dimarcello
authors.forename: Eric M
authors.initials: EM
authors.lastname: Monberg
authors.forename: David J
authors.initials: DJ
authors.lastname: DiGiovanni