Accurate refractive index profiling in a graded-index plastic optical fiber exceeding gigabit transmission rates

Takaaki Ishigure, Sho Tanaka, Eiji Kobayashi, Yasuhiro Koike

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54 Citations (Scopus)


An optimum index profile offering the highest bit rate communication was formed in a poly methyl methacrylate (PMMA)-based graded-index plastic optical fiber (GI-POF) by modifying the polymerization process. The interfacial-gel polymerization process we have proposed to fabricate the PMMA-based GI-POF is capable of forming a nearly optimum refractive index profile. However, the theoretically calculated bandwidth from the measured index profile was reduced compared with the GI-POF having optimum index profile. In this paper, we report how to obtain a PMMA-based GI-POF having exactly the optimum index profile. The bandwidth of this ideal GI-POF was experimentally measured and the very high bandwidth of 2.88 GHz even for a 150-m fiber length was confirmed. The calculated bandwidth agreed well with the experimentally measured one. These results indicate that very low modal dispersion can be expected in a GI-POF fabricated by the modified interfacial-gel polymerization process.

Original languageEnglish
Pages (from-to)1449-1456
Number of pages8
JournalJournal of Lightwave Technology
Issue number8
Publication statusPublished - 2002 Aug 1



  • Differential mode delay
  • Graded-index plastic optical fiber (GI-POF)
  • Interfacial-gel polymerization process
  • Refractive index profile

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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