公开(公告)号：US4820322A

公开(公告)日：1989-04-11

申请号：US99441

申请日：1987-09-23

申请人： Jerry W. Baumgart ,  Anthony T. D'Annessa ,  Franz T. Geyling ,  William M. Flegal ,  Thomas J. Miller

发明人： Jerry W. Baumgart ,  Anthony T. D'Annessa ,  Franz T. Geyling ,  William M. Flegal ,  Thomas J. Miller

IPC分类号： C03B23/07 ,  C03B37/012 ,  C03B37/025

CPC分类号： C03B37/01248 ,  C03B23/076 ,  C03B37/01211 ,  C03B2205/08 ,  Y02P40/57

摘要： Method and apparatus are provided for overcladding a preform rod (22). The preform rod is aligned with and inserted into an overcladding tube (30). The outer diameter of the preform rod and the inner diameter of the tube are such that the clearance between the tube and the rod does not exceed a predetermined value. Successive increments of length of the tube and rod therein are subjected to a controlled zone of heat while the pressure inside the tube is maintained at a value which is substantially less than that outside the tube. This causes the tube to be collapsed onto the preform rod to provide an overclad preform and subsequently a drawn optical fiber in which the overcladding is substantially concentric with respect to the optical fiber core.

摘要翻译： 提供了用于包覆预成型棒（22）的方法和装置。 预成型棒与外包管（30）对准并插入到外包管（30）中。 预制棒的外径和管的内径使得管和杆之间的间隙不超过预定值。 其中管和杆的连续长度的增量经受受控的热区，而管内的压力保持在基本上小于管外的压力。 这导致管被折叠到预制棒上，以提供外包层预制件和随后的拉伸光纤，其中外包层相对于光纤芯基本上是同心的。