| 摘要 |
A chemical vapor deposition process characterized by depositing a layer of glass on an interior surface of a tube with each cycle for depositing a layer comprising depositing a glass forming substance on the interior surface and subsequently converting the layer as the tube is rotated and between each cycle for each additional layer either changing the direction of rotation of the tube or the initial starting position for starting the transformation and maintaining an increased gas pressure within the tube during the entire forming step. In addition, when the tube is collapsed or formed into a rod so that an optical fiber can be drawn from an end thereof, the gas pressure is also maintained in the uncollapsed portion of the tube. |
