Design of tightly jacketed double-coated optical fibers to minimize thermally induced delamination of polymeric coatings

Sham-Tsong Shiue

doi:10.1117/1.602200

1 September 1999 Design of tightly jacketed double-coated optical fibers to minimize thermally induced delamination of polymeric coatings

Sham-Tsong Shiue

Author Affiliations +

Optical Engineering, Vol. 38, Issue 9, (September 1999). https://doi.org/10.1117/1.602200

To maintain its mechanical strength, the glass fiber of optical fibers is coated by polymeric materials during the fabrication process. However, when the thermally induced shear stress at the interface of the glass fiber and primary coating is larger than its adhesive stress, the polymeric coatings will be delaminated from the glass fiber, and the optical fiber will lose its mechanical strength. The design of tightly jacketed double-coated optical fibers to minimize the thermally induced delamination of polymeric coatings is investigated. To minimize the coating’s delamination, the thermally induced shear stress at the interface of the glass fiber and primary coating should be reduced. The method to minimize such a shear stress is to select suitable polymeric coatings as follows. The thickness and Poisson’s ratio of the primary coating should be increased. On the other hand, Young’s modulus of the primary coating, the thickness, Young’s modulus and thermal expansion coefficient of the secondary coating, and Young’s modulus and thermal expansion coefficient of the jacket should be decreased. Finally, the optimal design of commercialized tightly jacketed double-coated optical fibers to minimize the thermally induced coating’s delamination is also discussed.

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Sham-Tsong Shiue "Design of tightly jacketed double-coated optical fibers to minimize thermally induced delamination of polymeric coatings," Optical Engineering 38(9), (1 September 1999). https://doi.org/10.1117/1.602200

Published: 1 September 1999

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