High-thermally stable and high-bandwidth graded index plastic optical fiber for vehicle networks

Makoto Asai, Yasushi Yamaki, Satoshi Takahashi, Yasuhiro Koike

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Radial refractive index profiles within the graded index plastic optical fiber (GI-POF) is formed by adding a dopant to a polymer. This addition of the dopant significantly decreased the Tg of the polymer due to the plasticization. This disadvantage made the installation of the GI-POF difficult, especially in vehicle networks in which high thermal stability is required. We have suggested 9-bromophenanthrene (BPT) as a novel dopant induced less plasticization for poly(methyl methacrylate) (PMMA) than the conventional dopants. However, although the fabricated GI-POF using BPT had high enough thermal stability for vehicle networks, the attenuation was 800 dB/km and it could not be used. This high attenuation was caused by contaminant in the fabrication process of fibers. In this study, we succeeded to fabricate a GI-POF with low-attenuation and high-thermal stability using highly pure BPT. Its attenuation was improved to 240 dB/km at 650 nm, which was enough transparency for vehicle networks. The Tg of the GIPOF was improved to 107 °C from 90 °C. The thermal stability of the GI-POF below 85 °C/dry and 75 °C/85%RH was demonstrated to be as high as that of the commercially available step index POF. The bandwidth of the GI-POF could be estimated over 4.0 GHz for the 50-m fiber. These results demonstrated that our GI-POF should qualify to be used in vehicle network.

Original languageEnglish
Pages (from-to)1464-1469
Number of pages6
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume49
Issue number20
DOIs
Publication statusPublished - 2011 Oct 15

Fingerprint

Plastic optical fibers
plastic fibers
vehicles
optical fibers
bandwidth
Bandwidth
Thermodynamic stability
Doping (additives)
thermal stability
attenuation
Polymers
Fibers
Polymethyl Methacrylate
fibers
Polymethyl methacrylates
polymers
Transparency
polymethyl methacrylate
Refractive index
installing

Keywords

  • fibers
  • glass transition
  • high performance polymers
  • high temperature materials
  • optics
  • refractive index
  • thermal properties
  • thermal stability

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

High-thermally stable and high-bandwidth graded index plastic optical fiber for vehicle networks. / Asai, Makoto; Yamaki, Yasushi; Takahashi, Satoshi; Koike, Yasuhiro.

In: Journal of Polymer Science, Part B: Polymer Physics, Vol. 49, No. 20, 15.10.2011, p. 1464-1469.

Research output: Contribution to journalArticle

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