Invention Grant
US08826699B2 Method and device for manufacturing a primary preform for optical fibres 有权
用于制造光纤初级预制棒的方法和装置

Method and device for manufacturing a primary preform for optical fibres
Abstract:
A method for manufacturing a primary preform for optical fibers using an internal vapor deposition process including the steps of providing a substrate tube having supply and discharge sides, surrounding at least part of the tube by a furnace, supplying glass-forming gases to the interior of the tube via the supply side, creating a reaction zone with conditions such that deposition of glass will take place on the inner surface of the tube, and moving the reaction zone back and forth along the length of the tube between reversal points near the supply and discharge sides to form one or more preform layers on the inner surface of the tube, wherein both reversal points are surrounded by the furnace.
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