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 1058nm wavelength Yb fiber laser in a piece of a newly obtained fiber 20m in length within 1001200nm wavelengths band. The gain efficiency reaches as high as 0.2dB/mW. Bi-activated alumosilicate-core pure-silica-cladding fiber that is not more than 12m in length serves a basis for a 1W output power fiber laser emitting at the wavelength of 1160nm with 8% slope efficiency. We also measure the photoluminescence spectrum and kinetics of Bi centers responsible for laser emission under the excitation of 193nm wavelength ArF laser pulses.

© 2008 Optical Society of America

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