OPTICAL GLASS, CAPABLE OF LUMINESCENCE IN 1000-1700 nm RANGE, METHODS OF PRODUCING SAID GLASS (VERSIONS) AND FIBRE LIGHT GUIDE Russian patent published in 2012 - IPC C03C4/12 C03C3/12 

FIELD: chemistry.

SUBSTANCE: invention relates to laser glass and fibre light guides. Disclosed is optical glass, capable of luminescence in the 1000-1700 nm range when excited by radiation in the 400-900 nm wavelength range; the main glass-forming component in the glass is P₂O₅ and/or B₂O₃, and the luminescence source is bismuth in a subvalent state, wherein content of bismuth in terms of Bi₂O₃ ranges from 0.001 to 50 mol %. To obtain optical glass, a P₂O₅ and/or B₂O₃ source is mixed with a bismuth (III) source; the obtained mixture is heated at a rate of 0.1-2°C per minute to temperature 400-600°C; synproportioning of bismuth metal and the bismuth (III) source is carried out while heating to temperature 800-1100°C at a rate of 10-12°C per minute; the melt is cooled to solid state and then annealed. Bismuth metal is additionally introduced into the process after heating the mixture to 400-600°C or is obtained in the glass production process. In another version of the method, the mixture heated to 400-600°C is cooled to room temperature and the solidified melt is heated for 1-48 hours to temperature 700-1000°C in the atmosphere of an inert gas. The obtained optical glass can be used to make the core of a fibre light guide with a reflecting cladding, having refraction index lower than that of the core.

EFFECT: obtaining glass with stable luminescence in the 1000-1700 nm range using an optimum method.

17 cl, 14 ex, 2 tbl, 3 dwg