Method and device for manufacturing an optical preform

摘要

Disclosed is a method and device for manufacturing an optical preform. The method includes supplying dopant-containing glass-forming gases to the interior of a hollow glass substrate tube. Furthermore, the supply flow of dopant-containing glass-forming gases includes a main gas flow and one or more secondary gas flows. The secondary gas flows are divided into subflows, which are supplied to the interior of the hollow glass substrate tube together with the main gas flow. The method further includes effecting deposition of glass layers on the interior surface of the hollow glass substrate tube.

主权项

1. A method for manufacturing an optical-fiber preform, comprising:
subdividing a secondary gas flow that includes one or more dopants into a plurality of parallel dopant-containing subflows; setting a mass flow rate for each of the dopant-containing subflows; supplying the dopant-containing subflows and a main gas flow that includes glass-forming gases to the interior of a hollow substrate tube having an inlet side, an outlet side, and an interior surface; and creating conditions within the interior of the substrate tube to deposit glass layers onto the substrate tube's interior surface.