| 摘要 |
<p>The bore of a glass tube is coated with a layer of cladding glass. By introducing glass forming vapor reagents into the bore of the tube and heating the reagents with a heating excitor moving relative to the tube. The reagents proximate the heating excitor are converted to glass on the inside of the tube. The relative movement between the tube and excitor causes the glass layer to be uniform. In usual practice, the layer of cladding glass will be of equal or higher refractive index than that of the tube. A second layer of core glass of higher refractive index than that of the first layer may be deposited on the first layer. The conted tube is drawn into a fibre while collapsing the bore to form a solid core that may be surrounded by cladding.</p> |
