公开(公告)号：US20070163299A1

公开(公告)日：2007-07-19

申请号：US11615727

申请日：2006-12-22

申请人： Emmanuel PETITFRERE ,  Laurent Calvo ,  Cedric Gonnet

发明人： Emmanuel PETITFRERE ,  Laurent Calvo ,  Cedric Gonnet

IPC分类号： C03B37/07 ,  C03B37/028

CPC分类号： C03B37/01291

摘要： The invention relates to a method for manufacturing a final optical fiber preform by overcladding, said method comprising the steps of providing a primary preform; positioning said primary preform within at least one tube, wherein the at least one tube partly covers the primary preform to create a zone to be overcladded, being an overclad zone, which overclad zone is located on the primary preform outside the at least one tube; injecting a gas into the annular space between the primary preform and the at least one tube under overpressure relative to the pressure outside the at least one tube; overcladding the primary preform in the overclad zone with an overcladding material using an overcladding device. The invention also relates to an apparatus for carrying out the method. The invention allows overcladding a primary preform at low cost while maximally limiting the incorporation of impurities into the silica overclad.

摘要翻译： 本发明涉及一种用于通过外包制造最终光纤预制件的方法，所述方法包括以下步骤：提供初级预制件; 将所述初级预制件定位在至少一个管内，其中所述至少一个管部分地覆盖所述初级预制件以形成将被包覆的区域，作为外包层区域，所述外包层区域位于所述至少一个管子的所述初级预制件的外侧; 相对于至少一个管外部的压力，在超压下将气体注入到初级预制件和至少一个管之间的环形空间中; 使用外包装装置用外包装材料在外包层区域中包覆初级预制件。 本发明还涉及一种用于执行该方法的装置。 本发明允许以低成本包覆初级预制件，同时最大限度地限制杂质掺入二氧化硅外包层中。