| 摘要 |
The invention relates to optical waveguides. It relates to a process for the preparation of glasses intended for the manufacture of optical waveguides by the double-crucible process, which comprises melting under ultrapurity conditions a glass-forming starting charge made up of ultrapure raw materials, characterised in that, in combination: a. a small quantity of antimoine trioxide Sb2O3 of between 0.05 and 0.6 % by weight relative to the glass-forming charge, is incorporated in the initial charge, and b. oxygen is bubbled into the molten glass during the glass-melting process. Use for the production of optical fibres for telecommunications. <IMAGE>
|
