Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – Process of manufacturing optical fibers – waveguides – or...
Reexamination Certificate
2005-02-08
2005-02-08
Chin, Peter (Department: 1731)
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
Process of manufacturing optical fibers, waveguides, or...
C065S398000, C065S399000, C065S426000, C065S427000, C065S428000, C065S477000
Reexamination Certificate
active
06851281
ABSTRACT:
The present invention provides a method of fabricating rare earth doped preforms and optical fibers by a combination of modified chemical vapor deposition (MCVD) process and solution doping technique said MCVD process is used to develop matched or depressed clad structure inside a silica glass substrate tube followed by deposition of porous silica soot layer containing GeO2, P2O5or such refractive index modifiers by the backward deposition method for formation of the core and presintering the deposited particulate layer by backward pass with flow of GeCl4and/or corresponding dopant halides, soaking the porous soot layer into an alcoholic/aqueous solution of RE-salts containing codopants such as AlCl3in definite proportion, drying, oxidation, dehydration and sintering of the RE containing porous deposit and by collapsing at a high temperature to produce the preform followed by drawing the fibers by known technique to produce fibers with suitable core-clad dimensions and geometry.
REFERENCES:
patent: 5005175 (1991-04-01), Desurvire et al.
patent: 5058976 (1991-10-01), DiGiovanni et al.
patent: 5123940 (1992-06-01), DiGiovanni et al.
patent: 5151117 (1992-09-01), Bartholomew et al.
patent: 5474588 (1995-12-01), Tanaka et al.
patent: 5491581 (1996-02-01), Roba
patent: 5778129 (1998-07-01), Shukunami et al.
patent: 6125659 (2000-10-01), Yang
patent: 6178780 (2001-01-01), Morita
patent: 6751990 (2004-06-01), Bandyopadhyay et al.
Bhadra Shyamal Kumar
Chatterjee Somesh
Dasgupta Kamal
Pal Mrinmay
Paul Mukul Chandra
Chin Peter
Lopez Carlos
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