公开(公告)号：EP1182172A1

公开(公告)日：2002-02-27

申请号：EP01301191.1

申请日：2001-02-12

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Lum, Richard M. ,  Mixon, David A. ,  Monberg, Eric M. ,  Trevor, Dennis J.

IPC: C03B19/12

CPC classification number: C03B19/12 ,  C03B2201/04

Abstract: A process produces a glass overcladding tube from a silica gel body. The process includes passing the gel body through a hot zone under conditions that cause partial sintering of the gel body and repassing the gel body through the hot zone under conditions that further sinter the gel body into a glass overcladding tube. A preform for an optical fibre, comprising core, cladding layer and overcladding tube is also disclosed; the overcladding tube being the sintered, sol-gel produced, silica tube obtainable by the disclosed and claimed process of sintering the silica gel body.

Abstract translation: 的方法，从硅胶体内产生的玻璃外包管。 该方法包括使凝胶体通过的条件下的热区并导致凝胶体的部分烧结，并通过的条件下热区repassing凝胶体凝胶体没有进一步的烧结到玻璃外包管。 一种用于在光纤，其包括芯，包覆层和外包覆管预成型件是由此游离缺失盘; 外包管被制造的烧结，溶胶 - 凝胶，二氧化硅管可获得的游离缺失通过和所要求保护烧结硅胶体的过程中的光盘。

公开(公告)号：EP1114799A1

公开(公告)日：2001-07-11

申请号：EP00306722.0

申请日：2000-08-07

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Mixon, David A. ,  Monberg, Eric M. ,  Trevor, Dennis M.

IPC: C03B19/12 ,  C03B19/14 ,  B01J3/03 ,  C23C16/44 ,  F27D23/00

CPC classification number: F27D5/0068 ,  C03B19/12 ,  C03B19/1453 ,  F27B9/082 ,  F27B9/088 ,  F27D5/0062 ,  F27D7/02

Abstract: The invention provides a process capable of heating sol-gel tubes used in the manufacture of glass optical fibre preforms, or other bodies (11,27) in a manner that both limits the amount of undesirable condensation on cooler surfaces and also promotes heating and treatment with gaseous reactants in a uniform manner. In one embodiment, the process involves the steps of providing a furnace comprising a tubular muffle (10,29) having an opening at one end; placing tubes or other bodies (11,27) into the muffle through the opening; placing within the muffle, just inside the muffle opening, a cylindrical heat and gas shield (12,23), e.g., a plug; sealing the muffle opening with a door (13,20); heating the tubes; and treating the tubes by directing the gases (15,26) through a feed hole (14,21,24,25) located in the door or elsewhere in the muffle. The heat-gas shield controls the amount of heat reaching the door, thereby maintaining the integrity of the o-ring (16) door seal. It is also possible in other embodiments (Fig.2) for the shield to control the extent to which both process gases and condensable materials driven from the tubes are able to back diffuse toward the muffle door, thereby reducing or avoiding condensation of the materials on the door as well as undesirable reactions between the process gases and the o-ring seal of the door.

Abstract translation: 本发明提供了一种能够加热用于制造玻璃光纤预制件或其它主体（11,27）的溶胶 - 凝胶管的方法，其既限制了在较冷的表面上不期望的冷凝量并且还促进了加热和处理 气态反应物以均匀的方式。 在一个实施例中，该方法包括提供包括在一端具有开口的管状马弗管（10,29）的炉子的步骤; 通过开口将管或其他物体（11,27）放入马弗管; 放置在马弗炉内，正好位于马弗炉口内部，一个圆柱形的热气保护罩（12,23），例如一个塞子; 用门（13,20）密封马弗炉口; 加热管; 以及通过将气体（15,26）引导通过位于门中的进料孔（14,21,24,25）或马弗炉中的其他地方来处理管。 热气屏蔽控制到达门的热量，从而保持O形圈（16）门密封的完整性。 在其他实施例（图2）中，屏蔽罩也可以控制从管驱动的工艺气体和可冷凝材料能够朝向马弗炉门的方向扩散的程度，从而减少或避免材料冷凝 门以及工艺气体和门的O形圈密封件之间的不良反应。