公开(公告)号：US5979190A

公开(公告)日：1999-11-09

申请号：US118743

申请日：1998-07-17

Applicant: James William Fleming, Jr. ,  Robert M. Pafchek

Inventor： James William Fleming, Jr. ,  Robert M. Pafchek

IPC: G02B6/00 ,  B01J19/08 ,  C03B20/00 ,  C03B29/02 ,  C03B37/012 ,  C03B37/014 ,  C03C23/00 ,  C03C25/62 ,  C03B37/01

CPC classification number: C03C25/6293 ,  C03B29/02 ,  C03B37/01237 ,  C03B37/0148 ,  C03B37/01493 ,  C03C23/006 ,  C03B2201/03 ,  C03B2201/04

Abstract: A refractory dielectric body is heated with a plasma fireball at conditions which do not result in substantial removal of a surface portion of the body, yet which are sufficient to reduce both surface and bulk impurities. Typically, the body is treated with the plasma in the absence of simultaneous deposition of material onto the body. Advantageously, an isothermal, oxygen or oxygen-containing plasma is utilized. The invention is useful for reducing chlorine impurities by at least about 30% to a depth of at least about 10 .mu.m, with accompanying reduction of hydroxyl impurities. The invention thus provides a useful method for reducing the concentration of impurities that contribute to imperfections during the process of drawing fiber from an optical fiber preform, without requiring substantial removal of the surface of the preform.

Abstract translation: 在不会导致主体的表面部分的基本去除的条件下，用等离子体火球加热难熔电介质体，但这足以减少表面和体积杂质。 通常，在不将材料同时沉积到身体上的情况下，用等离子体处理身体。 有利地，使用等温，含氧或含氧等离子体。 本发明可用于将氯杂质减少至少约30％至至少约10μm的深度，伴随着羟基杂质的减少。 因此，本发明提供了一种有用的方法，用于在从纤维预制棒中拉伸纤维的过程中减少有助于缺陷的杂质的浓度，而不需要基本上去除预型体的表面。

公开(公告)号：US5174801A

公开(公告)日：1992-12-29

申请号：US717541

申请日：1991-06-19

Applicant: Mitsuo Matsumura ,  Hiroshi Matsui

Inventor： Mitsuo Matsumura ,  Hiroshi Matsui

IPC: C03C3/06 ,  C03B19/09 ,  C03B20/00 ,  C03C17/04 ,  C30B15/10 ,  C30B35/00

CPC classification number: C03B19/095 ,  C30B15/10 ,  C30B35/002 ,  C03B2201/03 ,  C03B2201/04 ,  Y02P40/57 ,  Y10S65/90

Abstract: A quartz glass crucible for use in a process for pulling a single crystal silicon and having an outer layer and an inner layer. The outer layer contains less than 0.3 ppm each of Na, K and Li and more thant 5 ppm of Al. The outer layer further contains bubbles to present an opaque appearance. The inner layer is made by melting powders of high purity non-crystalline synthetic silica and contains less then 200 ppm of OH group. There is also disclosed a method for producing the crucible.

公开(公告)号：US5059230A

公开(公告)日：1991-10-22

申请号：US468433

申请日：1990-01-22

Applicant: Linn F. Mollenauer ,  Jay R. Simpson ,  Kenneth L. Walker

Inventor： Linn F. Mollenauer ,  Jay R. Simpson ,  Kenneth L. Walker

IPC: C03B37/012 ,  C03B37/018 ,  C03C13/04 ,  G02B6/00

CPC classification number: C03C13/045 ,  C03B37/01211 ,  C03B2201/04 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2203/22 ,  Y10S65/90

Abstract: Reproducible doped optical fiber preforms having a predetermined dopant concentration level are fabricated by inserting a doped filament into a completed preform prior to consolidation and final collapse so that the filament and dopant materials are centrally located in the core region upon formation of the preform. Doped fiber is drawn from the doped preform using standard fiber drawing techniques.

公开(公告)号：US3966300A

公开(公告)日：1976-06-29

申请号：US325377

申请日：1973-01-22

Applicant: Gerhard Bernsee

Inventor： Gerhard Bernsee

IPC: C03B37/012 ,  C03C13/04 ,  G02B6/00 ,  G02B6/02 ,  G02B6/06 ,  G02B6/10 ,  G02B5/16

CPC classification number: G02B6/102 ,  C03B37/01211 ,  C03C13/045 ,  G02B6/02 ,  G02B6/06 ,  C03B2201/02 ,  C03B2201/04 ,  C03B2201/23

Abstract: Light-conducting optical fibers in which both the core and sheath consist essentially of quartz glass are provided by encasing a relatively anhydrous quartz glass core with a quartz glass sheath having a sufficiently high water content to lower the refractive index thereof. The fibers are ideally suited for the transmission of ultraviolet light with maximum efficiency.

Abstract translation: 通过用具有足够高的水含量的石英玻璃护套包裹相对无水的石英玻璃芯来提供芯和壳基本上由石英玻璃组成的导光光纤，以降低其折射率。 这些纤维非常适用于以最大效率传输紫外线。