title: Bismuth activated alumosilicate optical fibers fabricated by surface-plasma chemical vapor deposition technology.
abstract: Plasma chemical technology is experimentally applied to the fabrication of a Bi-activated alumosilicate-core pure-silica-cladding fiber preform. To the best of our knowledge, this is the first time this technology has been applied in this way. We measure gain efficiency at pumping by a 1058 nm wavelength Yb fiber laser in a piece of a newly obtained fiber 20 m in length within 100-1200 nm wavelengths band. The gain efficiency reaches as high as 0.2 dB/mW. Bi-activated alumosilicate-core pure-silica-cladding fiber that is not more than 12 m in length serves a basis for a 1 W output power fiber laser emitting at the wavelength of 1160 nm with 8% slope efficiency. We also measure the photoluminescence spectrum and kinetics of Bi centers responsible for laser emission under the excitation of 193 nm wavelength ArF laser pulses.
authors.affiliation: Fiber Optics Research Center of the Russian Academy of Sciences, 38 Vavilov Street, 119991 Moscow, Russia. iabuf@fo.gpi.ru
authors.forename: Igor A
authors.initials: IA
authors.lastname: Bufetov
authors.forename: Konstantin M
authors.initials: KM
authors.lastname: Golant
authors.forename: Sergey V
authors.initials: SV
authors.lastname: Firstov
authors.forename: Artem V
authors.initials: AV
authors.lastname: Kholodkov
authors.forename: Alexey V
authors.initials: AV
authors.lastname: Shubin
authors.forename: Evgeny M
authors.initials: EM
authors.lastname: Dianov