High-bandwidth graded-index plastic optical fiber by the dopant diffusion coextrusion process

Makoto Asai, Ryoma Hirose, Atsushi Kondo, Yasuhiro Koike

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Today, the number of services, which includes large information contents like high-definition movies, is rapidly increasing. The graded-index plastic optical fiber (GI-POF) has been proposed as a solution. The conventional fabrication method of GI-POF, however, is unsuitable for mass production. Therefore, we propose the dopant diffusion coextrusion process for fabricating high-bandwidth GI-POF. It has been generally thought that formation mechanism of refractive-index distribution in optical polymer materials by this process would be a Fick's diffusion with constant diffusion coefficient and, therefore, has a tailing part at the core-cladding boundary. Contrary to predictions, we succeed in fabricating GI-POF with an almost optimum-index distribution. It is made evident by experiments and simulation that the formation mechanism of GI-POF by this process is a Fick's diffusion with diffusion coefficient dependent on dopant concentration. These results indicate high possibility of fabrication of high-bandwidth fibers of a polymethyl methacrylate-diphenyl sulfide system by the dopant diffusion coextrusion process.

Original languageEnglish
Pages (from-to)3062-3067
Number of pages6
JournalJournal of Lightwave Technology
Volume25
Issue number10
DOIs
Publication statusPublished - 2007 Oct

Fingerprint

Coextrusion
Plastic optical fibers
plastic fibers
optical fibers
Doping (additives)
bandwidth
Bandwidth
diffusion coefficient
Fabrication
fabrication
Tailings
Polymethyl methacrylates
polymethyl methacrylate
sulfides
Refractive index
refractivity
fibers
Fibers
polymers
Polymers

Keywords

  • Boltzmann-Matano method
  • Co-extrusion process
  • Diffusion
  • Dopant
  • Graded index plastic optical fiber

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

High-bandwidth graded-index plastic optical fiber by the dopant diffusion coextrusion process. / Asai, Makoto; Hirose, Ryoma; Kondo, Atsushi; Koike, Yasuhiro.

In: Journal of Lightwave Technology, Vol. 25, No. 10, 10.2007, p. 3062-3067.

Research output: Contribution to journalArticle

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