Long-term thermally interfacial-shear-stress-induced delamination of polymeric coatings from glass fibers in double-coated optical fibers

Ting-Ying Shen; Sham-Tsong Shiue

doi:10.1117/1.1563647

1 May 2003 Long-term thermally interfacial-shear-stress-induced delamination of polymeric coatings from glass fibers in double-coated optical fibers

Ting-Ying Shen, Sham-Tsong Shiue

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Optical Engineering, Vol. 42, Issue 5, (May 2003). https://doi.org/10.1117/1.1563647

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.

©(2003) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Ting-Ying Shen and Sham-Tsong Shiue "Long-term thermally interfacial-shear-stress-induced delamination of polymeric coatings from glass fibers in double-coated optical fibers," Optical Engineering 42(5), (1 May 2003). https://doi.org/10.1117/1.1563647

Published: 1 May 2003

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