公开(公告)号：US20140174134A1

公开(公告)日：2014-06-26

申请号：US13726906

申请日：2012-12-26

申请人： HERAEUS QUARZGLAS GMBH & CO. KG ,  HERAEUS TENEVO LLC

发明人： Georges Levon FATTAL ,  Oliver GANZ ,  Kai CHANG

IPC分类号： C03B37/012

CPC分类号： C03B37/01211 ,  C03B37/01245 ,  C03B37/01248 ,  Y02P40/57

摘要： A method of manufacturing an optical fiber preform or an optical fiber is provided. The method includes the steps of: (a) providing a glass tube and a glass core rod; (b) inserting the glass core rod into the glass tube to form an assembled body; (c) heating the assembled body to cause the glass tube to collapse on and adhere to the glass core rod; and (d) treating an interface gap between the glass core rod and the glass tube during heating of at least a portion of the assembled body. Treating of the interface gap involves: (i) establishing a vacuum pressure in the interface gap, (ii) increasing a pressure of the interface gap by a treatment gas through the interface gap for a predetermined time, and (iii) re-establishing a vacuum pressure in the interface gap after the predetermined time has elapsed.

摘要翻译： 提供一种制造光纤预制棒或光纤的方法。 该方法包括以下步骤：（a）提供玻璃管和玻璃芯棒; （b）将玻璃芯棒插入玻璃管中以形成组装体; （c）加热组装体以使玻璃管塌陷并附着在玻璃芯棒上; 和（d）在加热组装体的至少一部分期间处理玻璃芯棒和玻璃管之间的界面间隙。 处理界面间隙包括：（i）在界面间隙中建立真空压力，（ii）通过处理气体通过界面间隙增加界面间隙的压力达预定时间，以及（iii）重建 经过预定时间之后界面间隙中的真空压力。

公开(公告)号：US20180002215A1

公开(公告)日：2018-01-04

申请号：US15542199

申请日：2015-01-22

申请人： HERAEUS TENEVO LLC ,  HERAEUS QUARZGLAS GMBH & CO. KG

发明人： Georges Levon FATTAL ,  James E. BEAVERS, Jr. ,  Oliver GANZ ,  Kai Huei CHANG

IPC分类号： C03B23/045 ,  C03B37/012 ,  C03B23/047 ,  C03B37/025

摘要： Apparatus and method for producing elongated glass components with low bow. The apparatus may include a heating element to heat a bulk glass component where a strand may be drawn from the bulk glass component in a downward direction and a gripper device including a clamping element to support the strand while pulling or drawing it from the bulk glass component in a linear motion, and a low-friction mounting element attached to the clamping element which allows translational movement of the clamping element in an x-y plane. The gripper device may further be used to reduce bow in the strand while it is being drawn by moving the clamping element on the mounting element in a direction opposite the direction of any measured transverse acceleration.

公开(公告)号：US20170254733A1

公开(公告)日：2017-09-07

申请号：US15517045

申请日：2014-10-14

申请人： HERAEUS TENEVO LLC

发明人： Georges Levon FATTAL ,  James E. BEAVERS, Jr. ,  Kai Huei CHANG ,  Evan P. GREEN ,  Qiulin MA

IPC分类号： G01N11/06 ,  C03B37/012 ,  G01N11/08

CPC分类号： G01N11/06 ,  C03B23/047 ,  C03B23/0473 ,  C03B37/0124 ,  C03B37/01242 ,  C03B2205/40 ,  G01N11/00 ,  G01N11/02 ,  G01N11/04 ,  G01N11/08 ,  G01N2011/006

摘要： Methods for preform and tube draw based on controlling forming zone viscosity determined by calculating a holding force exerted by the glass component in the forming zone on the strand being drawn below. The holding force may be calculated by determining a gravitational force applied to the strand and a pulling force applied to the strand by a pulling device, where the holding force is equal to the opposite of the algebraic sum of the gravitational and pulling forces. The holding force may also be calculated by measuring a stress-induced birefringence in the strand at a point between the forming zone and the pulling device, determining an amount of force applied to the strand at the point corresponding to the birefringence, and calculating the holding force by correcting the amount of force for a gravitational effect of the weight of the strand between the forming zone and the point.

公开(公告)号：US20170240455A1

公开(公告)日：2017-08-24

申请号：US15503029

申请日：2014-08-13

申请人： Heraeus Tenevo LLC

发明人： Kai CHANG ,  Georges Levon FATTAL ,  Qiulin MA

IPC分类号： C03B37/027 ,  C03B23/207 ,  C03B37/012

CPC分类号： C03B37/02736 ,  C03B23/207 ,  C03B37/01205 ,  C03B37/0124 ,  C03B37/0126 ,  C03B37/01486 ,  Y02P40/57

摘要： A method of producing a quartz glass optical component is provided. The method includes providing a cylindrical quartz glass body made of core rod glass and cladding glass. The quartz glass body has a square cut first end having a first outer diameter. The method further includes providing a glass handle having a first end and an opposing square cut second end having a second outer diameter which is between 50% and 110% of the first outer diameter; attaching the square cut end of the glass handle to that of the quartz glass body; and using the glass handle to guide the quartz glass body through a draw furnace. A distortion in a clad-to-core ratio proximate the interface of the cylindrical quartz glass body and the glass handle is less than 5%.