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Optical Engineering

Hermetic splice overcoating
Author(s): Daryl Inniss; John T. Krause
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Paper Abstract

During fusion splicing of hermetic carbon-coated silica fibers, the local carbon film is removed. A process to restore the carbon coating in the splice region is described. A CO2 laser is used to heat the silica surface locally, and the atmosphere of the bare section is controlled by a specially designed reaction chamber. An average strength of 2.91 GPa is realized in the carbon-overcoated region. A minimum n value of 165 is determined from dynamic fatigue measurements of carbon-overcoated splices. Furthermore, static fatigue measurements made in concentrated hydrofluoric acid solutions demonstrate the hermetic nature of this film. This process, therefore, offers a practical technique to overcoat spliced hermetic carbon-coated silica fibers.

Paper Details

Date Published: 1 June 1991
PDF: 4 pages
Opt. Eng. 30(6) doi: 10.1117/12.55861
Published in: Optical Engineering Volume 30, Issue 6
Show Author Affiliations
Daryl Inniss, AT&T Bell Labs. (United States)
John T. Krause, AT&T Bell Labs. (United States)

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