公开(公告)号：US5639290A

公开(公告)日：1997-06-17

申请号：US457802

申请日：1995-06-01

申请人： Toshimi Habasaki ,  Koji Takata ,  Fumitaka Uchino ,  Koji Amemiya ,  Yuji Takahashi

发明人： Toshimi Habasaki ,  Koji Takata ,  Fumitaka Uchino ,  Koji Amemiya ,  Yuji Takahashi

IPC分类号： C03B8/04 ,  C03B20/00 ,  C03B37/014 ,  C03B37/018 ,  G02B6/00

CPC分类号： C03B37/0144 ,  Y02P40/57

摘要： The present invention relates to a process for producing a porous glass preform for an optical fiber and an apparatus for conducting such a process. According to the process, fine glass particles are produced by heating and reacting vaporous starting materials in a reaction vessel. The resulting fine glass particles are thereafter deposited to obtain the porous glass preform. An exhaust gas containing non-deposited fine glass particles is exhausted through an exhaust duct at a velocity above 15 m/sec. Preferably, pressure fluctuation in the reaction vessel is minimized by supplying air from outside of the reaction vessel to the exhaust duct. In accordance with the present invention, the exhaust duct is less likely to become obstructed by non-deposited fine glass particles. As a result, the preform can be produced without interruption over an extended period of time.

摘要翻译： 本发明涉及一种用于制造光纤用多孔玻璃预制件的方法和用于进行这种方法的设备。 根据该方法，通过在反应容器中加热和使蒸气原料反应来制造细玻璃颗粒。 然后沉积所得细玻璃颗粒以获得多孔玻璃预制件。 含有未沉积的微细玻璃颗粒的废气以15m / sec的速度通过排气管排出。 优选地，通过从反应容器的外部向排气管供应空气来最小化反应容器中的压力波动。 根据本发明，排气管不太可能被未沉积的微细玻璃颗粒所妨碍。 结果，可以在长时间内不间断地制造预成型件。