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A series of barium gallium-germanate glasses (84-х) GeO2–14BaO–2Ga2O3–x Bi2O3 (х=0; 0,1; 1; 3; 5mol%) was synthesized by crucible technology. It was revealed that the appearance of a BaGe4O9 crystalline phase took place after additional thermal treatment of the glass samples. The structural and optical properties of the glasses and glass-ceramics were studied. It was shown that the spectral shapes...
The bismuth-doped fibres are a new type of active medium for high-power NIR fibre lasers within a spectral range 1140 – 1550 nm. CW Bi-doped fibre lasers at 1160, 1270, and 1330 nm with output power ∼10 W were demonstrated earlier [1–3]. At longer wavelengths 1400–1500 nm the output power achieved so far has not exceeded 2 W [2]. The purpose of this paper was to create a powerful bismuth fibre laser...
As it was shown recently, bismuth-doped silica optical fibers are promising as a gain medium for fiber lasers and amplifiers operating in the range 1150–1500 nm (see, e.g. review [1]). And it was already demonstrated that Bi-doped fiber lasers can show high effeciency and high power operation within several sub-bands of this wavelength range: 1150–1200 nm, 1280–1360 nm and around 1460 nm [1,2]. Up...
Watt-level ∼20% efficiency Bi fiber lasers have been demonstrated at 1340 and 1480 nm for the first time. Optical properties of Bi-doped phosphogermanosilicate fibers depending on core composition were investigated.
Optical properties of Bi-doped phosphogermanosilicate fibers were investigated. It was demonstrated that fiber lasers based on fibers of this type can generate radiation in a broad-band range of 1300-1520 nm.
Fabrication technique and spectroscopic study of MCVD Bi-Na-doped phosphosilicate glass core optical fibres are discussed. The fibres reveal a broadband luminescence with the maximum in 1300 nm range.
The anti-Stokes visible luminescence and upconversion processes in Bi-doped silica-based fibers were investigated. The upconversion coefficients, absorption cross-sections and concentrations of bismuth-active centers in silica-based fibers were estimated.
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