Effect of dopant structure on refractive index and glass transition temperature of GI POF cores

Kotaro Koike, Hongxiang Teng, Yasuhiro Koike, Yoshiyuki Okamoto

Research output: Contribution to conferencePaper

Abstract

Graded-index plastic optical fibers (GI POFs), composed of doped polymers, have advantages over conventional glass optical fibers (GOFs), but need to be developed further for practical application. Here, a variety of aromatic sulfide dopants were synthesized and their effects on the refractive indexes and glass transition temperatures (Tg) of poly(methyl methacrylate) and methyl 2-chloroacrylate/2,2,2-trichloroethyl methacrylate copolymers were studied. While polymers containing large dopants exhibited relatively high refractive indices, their Tg values were low, making these materials unsuitable for GI POF applications. Six dopants yielded polymers that exhibited higher Tg values than the conventionally used (diphenyl sulfide)-doped polymer. The dopant dibenzothiophene, in particular, yielded polymers with the highest refractive indexes and Tg values, and polymers containing (phenylthio)benzene dopants also performed well.

Original languageEnglish
Pages199-202
Number of pages4
Publication statusPublished - 2014 Jan 1
Event23rd International Conference on Plastic Optical Fibers, POF 2014 - Hiyoshi, Yokohama, Japan
Duration: 2014 Oct 82014 Oct 10

Other

Other23rd International Conference on Plastic Optical Fibers, POF 2014
CountryJapan
CityHiyoshi, Yokohama
Period14/10/814/10/10

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Keywords

  • Dopant
  • Fibers
  • Glass transition
  • Radical polymerization
  • Refractive index

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Koike, K., Teng, H., Koike, Y., & Okamoto, Y. (2014). Effect of dopant structure on refractive index and glass transition temperature of GI POF cores. 199-202. Paper presented at 23rd International Conference on Plastic Optical Fibers, POF 2014, Hiyoshi, Yokohama, Japan.