| 摘要 |
<p>A method of making a preform for drawing optical fibres includes the steps of depositing a dopant material (3) in a dopant carrier chamber (1), heating the dopant material to cause it to vaporise at a predetermined rate, depositing from a mixture of a source material (GeCl4, SiO4, O2) and said vaporised dopant a mixture of solid components (8) and fusing said solid components to form a doped glass.</p> |
