Abstract
We describe a procedure for the preparation of As-S-Se and As-Se-Te glasses with low contents of gas-forming impurities (hydrogen, oxygen, and carbon) via melting of extrapure-grade elements in an evacuated silica ampule and purification of the melt by chemical distillation. The impurity concentrations in the glasses thus prepared have been reduced to the following levels: hydrogen, <0.02; oxygen, 0.2; carbon, <0.02; silicon, <0.4 ppm by weight. Using the double-crucible method, we have fabricated glass fibers with various ratios of the core and cladding diameters (1: 25 to 9: 10), protected with a tetrafluoroethylene/1,1-difluoroethylene copolymer coating, which have an average bending strength of 0.5–1 GPa. The minimal optical losses are 150 dB/km at 6.6 μm in multimode As-Se-Te glass fibers and 60 dB/km at 4.8 μm in As-S-Se glass fibers. The effect of microinhomogeneities in the melt on the optical performance of arsenic sulfoselenide glass fibers fabricated by the double-crucible method is examined.
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Original Russian Text © M.F. Churbanov, V.S. Shiryaev, A.I. Suchkov, A.A. Pushkin, V.V. Gerasimenko, R.M. Shaposhnikov, E.M. Dianov, V.G. Plotnichenko, V.V. Koltashev, Yu.N. Pyrkov, J. Lucas, J.-L. Adam, 2007, published in Neorganicheskie Materialy, 2007, Vol. 43, No. 4, pp. 506–512.
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Churbanov, M.F., Shiryaev, V.S., Suchkov, A.I. et al. High-purity As-S-Se and As-Se-Te glasses and optical fibers. Inorg Mater 43, 441–447 (2007). https://doi.org/10.1134/S0020168507040206
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DOI: https://doi.org/10.1134/S0020168507040206