Analysis of a coextrusion process for preparing gradient-index polymer optical fibers

Yung Chang, Wen Chang Chen, Ming Hsin Wei, Wen Chung Wu

Research output: Contribution to journalArticle

Abstract

A theoretical modeling was introduced on a coextrusion process for preparing gradient-index (GI) polymer optical fibers (POFs). The effects of the mass transfer coefficient (k) between the fiber preform and the purging gas, and the interlayer number (n) on the refractive index distribution (RID) of POFs were investigated. The predicted refractive index distribution (RID) was in a satisfactory agreement with the experimental data reported in the literature. The order of An value in the studied systems was k*(∼ ∞) > k* (=5) > k* (∼0) for various interlayer numbers. As k closes to a very small or a very large value, the RID deviates significantly from the parabolic RI distribution. The order of the degree of the RI distribution close to a parabolic distribution is five-layer > four-layer > three-layer > two-layer. The result suggests that the greater the layer number in the multilayer coextrusion process, the closer the RID is to a parabolic curve. These results provide a way to monitor the RID of POFs by process design.

Original languageEnglish
Pages (from-to)165-175
Number of pages11
JournalACS Symposium Series
Volume795
Publication statusPublished - 2001 Dec 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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