Bismuth activated alumosilicate optical fibers fabricated by surface-plasma chemical vapor deposition technology |
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Authors: | Bufetov Igor A Golant Konstantin M Firstov Sergey V Kholodkov Artem V Shubin Alexey V Dianov Evgeny M |
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Affiliation: | Fiber Optics Research Center of the Russian Academy of Sciences, 38 Vavilov Street, 119991 Moscow, Russia. iabuf@fo.gpi.ru |
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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. |
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