Abstract:The recent results on the new laser material -Bidoped glasses and optical fibers are reviewed. First, luminescence properties of various Bi-doped glasses are discussed. At last the results of investigations of Bi-doped fiber lasers covering a wavelength range of 1150 -1550 nm are presented.

Optical fibers with bismuth-doped silicate and germanate glass cores were fabricated by the modified chemical vapor deposition technique (solution and vapor-phase Bi incorporation). The fibers revealed an efficient luminescence with a maximum in the 1050-1200 nm spectral range, FWHM up to 200 nm, and a lifetime of the order of 1 ms.

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Continuous-wave lasing of Bi-doped fiber lasers in a wavelength range of 1150-1215 nm with a power of up to 15 W has been obtained for the first time. The unsaturable optical losses in Bi-doped fibers have been revealed and their influence on the Bi-laser operation is investigated. Frequency doubling of the Bi-fiber laser radiation is demonstrated that can be used as a yellow light source (wavelength of 580 nm).