Method and apparatus for reducing stress between depositions...

Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – Process of manufacturing optical fibers – waveguides – or...

Reexamination Certificate

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C065S399000, C065S415000, C065S417000, C065S421000

Reexamination Certificate

active

06862900

ABSTRACT:
A method and apparatus for forming a glass article such as an optical fiber having a substantially matching viscosity across an interface associated with a first section and a second section of the optical fiber is disclosed herein. The first section has a first halogen concentration and the second section has a second halogen concentration. At least one of a partial pressure of the second halogen provided to a substrate tube and a temperature of the substrate tube is configured to affect the concentration of the second halogen in the second section. Optical fiber embodiments are also included.

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T. Miya et al.,Ultimate Low-Loss Single-Mode Fibre at 1-55 μm, Electronics Letters, pp. 106-108, vol. 15-No. 4, Feb. 15, 1979.
H. Wehr and D. Wiechert,Refractive Index and Density of Fluorine Doped Silica Prepared by the PCVD Process, Materials Research Bulletin, pp. 559-566, vol. 21-No. 5, May 1986.

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