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Optical Engineering

Long-term thermally interfacial-shear-stress-induced delamination of polymeric coatings from glass fibers in double-coated optical fibers
Author(s): Ting-Ying Shen; Sham-Tsong Shiue
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Paper Abstract

This study investigates the delamination of polymeric coatings from glass fibers in double-coated optical fibers, induced by long-term thermal interfacial shear stress. The shear stress between the fiber and the primary coating should always be lower than the interfacial shear strength to prevent delamination. It can be minimized by properly selecting the physical properties of the coatings as follows: The thickness and Young's modulus of the secondary coating can be decreased so long as the requirement for the strength of the secondary coating is satisfied. The thickness of the primary coating can be increased if the spring constant of the optical fiber is chosen to prevent microbending of the glass fiber at low temperature. Meanwhile, Poisson's ratio of the primary coating is set very close to 0.5. The Young's modulus and the relaxation time of the primary coating, and the thermal expansion coefficient and the relaxation time of the secondary coating, should all be minimized.

Paper Details

Date Published: 1 May 2003
PDF: 4 pages
Opt. Eng. 42(5) doi: 10.1117/1.1563647
Published in: Optical Engineering Volume 42, Issue 5
Show Author Affiliations
Ting-Ying Shen, Feng Chia Univ. (Taiwan)
Sham-Tsong Shiue, Feng Chia Univ. (Taiwan)

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