Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – Process of manufacturing optical fibers – waveguides – or...
Patent
1997-09-29
1999-01-19
Chin, Peter
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
Process of manufacturing optical fibers, waveguides, or...
134 11, 204164, C03B 37018
Patent
active
058610472
ABSTRACT:
A refractory dielectric body is heated with a plasma torch 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 solid, e.g., a rod as opposed to a tube, and is treated with the plasma in the absence of simultaneous deposition of material onto the body. Advantageously, an isothermal plasma torch is utilized, and the torch advantageously produces an oxygen or oxygen-containing plasma. 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.
REFERENCES:
patent: 4746345 (1988-05-01), Pluijms et al.
patent: 4761170 (1988-08-01), Mansfield
patent: 4854956 (1989-08-01), Pluijms
patent: 4863501 (1989-09-01), Mansfield
patent: 4983225 (1991-01-01), Gruenwald et al.
patent: 5000771 (1991-03-01), Fleming, Jr. et al.
patent: 5106402 (1992-04-01), Geittner et al.
patent: 5194714 (1993-03-01), Le Sergent
patent: 5221306 (1993-06-01), Fleming, Jr. et al.
patent: 5397372 (1995-03-01), Partus et al.
patent: 5692087 (1997-11-01), Partus et al.
Fleming, Jr. James William
Pafchek Robert M.
Chin Peter
Lucent Technologies - Inc.
Rittman Scott J.
Vincent Sean
LandOfFree
Method for manufacturing an article comprising a refractory diel does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for manufacturing an article comprising a refractory diel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for manufacturing an article comprising a refractory diel will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1244014