Minimisation of thermally induced microbending losses in dual-coated optical fibres caused by viscoelastic behaviour of commercial polymeric coatings

Author

Yu-Chun Hsueh ; Sheng-Che Chiou ; Sham-Tsong Shiue

Author_Institution

Dept. of Mater. Sci. & Eng., Nat. Chung Hsing Univ., Taichung, Taiwan

Volume

9

Issue

3

fYear

2015

fDate

6 2015

Firstpage

141

Lastpage

144

Abstract

The viscoelastic behaviour of commercial polymeric coatings for optical fibres is measured at room temperature using dynamic mechanic analysis, and the relationship between strain and stress in polymeric coatings is obtained. The thermally induced viscoelastic stresses in dual-coated optical fibres are derived from the viscoelastic behaviour of commercial polymeric coatings. The compressive radial stress on the glass fibre surface produces microbending losses, which can be diminished by properly choosing the thickness and material properties of polymeric coatings. The design of dual-coated optical fibres to diminish thermally induced microbending losses caused by viscoelastic behaviour of polymeric coatings is proposed. The thermally induced microbending loss in dual-coated optical fibres evaluated by Maxwell model is underestimated.

Keywords

bending; compressibility; glass fibres; optical design techniques; optical fibre losses; optical glass; optical polymers; polymer films; stress-strain relations; thermo-optical effects; viscoelasticity; Maxwell model; compressive radial stress; dual-coated optical fibre design; dynamic mechanic analysis; glass fibre surface; polymeric coatings; strain-stress relations; temperature 293 K to 298 K; thermally induced microbending losses; thermally induced viscoelastic stresses; viscoelastic behaviour;

fLanguage

English

Journal_Title

Optoelectronics, IET

Publisher

iet

ISSN

1751-8768

Type

jour

DOI

10.1049/iet-opt.2014.0025

Filename

7106077