
Proceedings Paper
A model for inert strength reduction in carbon-coated optical fibersFormat | Member Price | Non-Member Price |
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Paper Abstract
The inert strength of carbon-coated optical fibers (hermetic
fibers) has been observed to be less than that of standard polymer
coated optical fibers. A scaled version of the of the
carbon-coated optical fiber was developed in the laboratory and
used in an experimental investigation of the mechanical properties
of this system. The microstructure and phase similarity between
the scaled system and the optical fiber was established using
Raman spectroscopy. The mechanical properties, residual stress in
the film and the fracture toughness of the scaled system were
determined using nano-indentation. A fracture mechanics model was
developed to explain the mechanism of this strength reduction. The
model, based on the cracking of thin films in residual tension,
will be used to predict growth of flaws from the carbon film and
penetrating into the substrate. The model can be applied to all
brittle coatings where delamination of the coating is not
observed. Conditions under which cracks in the carbon film
propagate into the substrate were investigated using a recently
developed superposition scheme. Possible methods of crack arrest
will be discussed.
Paper Details
Date Published: 10 September 2004
PDF: 10 pages
Proc. SPIE 5465, Reliability of Optical Fiber Components, Devices, Systems, and Networks II, (10 September 2004); doi: 10.1117/12.546040
Published in SPIE Proceedings Vol. 5465:
Reliability of Optical Fiber Components, Devices, Systems, and Networks II
Hans G. Limberger; M. John Matthewson, Editor(s)
PDF: 10 pages
Proc. SPIE 5465, Reliability of Optical Fiber Components, Devices, Systems, and Networks II, (10 September 2004); doi: 10.1117/12.546040
Show Author Affiliations
Srinath S Chakravarthy, Univ. of Connecticut (United States)
Wilson S. K. Chiu, Univ. of Connecticut (United States)
Published in SPIE Proceedings Vol. 5465:
Reliability of Optical Fiber Components, Devices, Systems, and Networks II
Hans G. Limberger; M. John Matthewson, Editor(s)
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