Manufacture of high purity glass tubes

Details Manufacture of high purity glass tubes Manufacture of high purity glass tubes

2006-04-04

2006-04-04

Hoffmann, John (Department: 1731)

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

Process of manufacturing optical fibers, waveguides, or...

C065S023000, C065S414000, C065S433000, C065S427000

Reexamination Certificate

active

07021083

ABSTRACT:
A glass tube for use in an optical fiber preform is produced by applying a first soot on an end face of a starting member to form an elongated, porous cylindrical soot core having a first density, and applying a second soot including SiO2on the periphery of the soot core to form a porous soot cladding having a second density greater than that of the soot core at the periphery of the core. The core and the cladding are later heated together at a temperature sufficient for sintering to form a core glass and a cladding glass. Because the soot core collapses at a greater rate than the soot cladding during sintering, the core glass separates or delaminates radially from the cladding glass. The core glass is then removed from the surrounding cladding glass, and the latter is treated to provide a high purity glass tube suitable for use as part of an optical fiber preform.

REFERENCES:
patent: 2272342 (1942-02-01), Hyde
patent: 4062665 (1977-12-01), Izawa et al.
patent: 4191545 (1980-03-01), MacChesney et al.
patent: 4648891 (1987-03-01), Abe
patent: 4775401 (1988-10-01), Fleming et al.
patent: 5182052 (1993-01-01), Lydtin et al.
patent: 5281248 (1994-01-01), Barish et al.
patent: 5294237 (1994-03-01), Mizuno et al.
patent: 5429653 (1995-07-01), Leber et al.
patent: 5667547 (1997-09-01), Christiansen et al.
patent: 5769921 (1998-06-01), Yokokawa et al.
patent: 5827346 (1998-10-01), Kopylov et al.
patent: 5837334 (1998-11-01), Yokokawa et al.
patent: 6131415 (2000-10-01), Chang et al.
patent: 6236797 (2001-05-01), Hotta et al.
patent: 6405563 (2002-06-01), Nagata et al.
patent: 6669892 (2003-12-01), Ganguli et al.
patent: 6898359 (2005-05-01), Soljacic et al.
patent: 2002/0157425 (2002-10-01), Werner et al.
patent: 2003/0070451 (2003-04-01), Ouellet et al.
patent: 2005/0109065 (2005-05-01), Ichii et al.
H. Murata, Recent Developments in Vapor Phase Axial Deposition, Journal of Lightwave Technology, v. LT-4, No. 8 (Aug. 1986).

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