Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – Process of manufacturing optical fibers – waveguides – or...
Reexamination Certificate
2011-01-25
2011-01-25
Dehghan, Queenie (Department: 1741)
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
Process of manufacturing optical fibers, waveguides, or...
Reexamination Certificate
active
07874180
ABSTRACT:
The specification describes the production of optical fibers and optical fiber preforms using Chemical Powder Deposition (CPD). In this process a slurry of silica powders and dopant powders in a liquid carrier is prepared and the inside surface of a silica glass starter tube is coated with the slurry, then dried. The coating is then consolidated and the tube collapsed as in the conventional MCVD process. Multiple coatings, and coatings with varying compositions, can be used to produce any desired profile. In an alternative embodiment, doped silica glass of the desired final composition is prepared, and then pulverized to form the powder for the slurry. In both embodiments, the use of powders of known composition in the slurry allows direct control over the final glass composition, as compared with conventional processes in which the composition in the final glass is indirectly controlled by control of the thermodynamics of a vapor phase reaction.
REFERENCES:
patent: 2833665 (1958-05-01), Drexel et al.
patent: 4443239 (1984-04-01), Biswas et al.
patent: 4610708 (1986-09-01), Sarhangi et al.
patent: 5332597 (1994-07-01), Carolan et al.
patent: 6207337 (2001-03-01), Swain
patent: 2003/0182970 (2003-10-01), Sen et al.
patent: 158601 (1985-10-01), None
MacChesney John Burnette
Stockert Thomas Edward
Wisk Patrick William
Yan Man Fei
Dehghan Queenie
OFS-Fitel L
Wilde Peter V. D.
LandOfFree
Chemical powder deposition method for the manufacture of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Chemical powder deposition method for the manufacture of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical powder deposition method for the manufacture of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2703680