GI-POF prepared by the dopant diffusion co-extrusion process

Atsushi Kondo, Makoto Asai, Ryoma Hirose, Takaaki Ishigure, Yasuhiro Koike

Research output: Contribution to journalArticlepeer-review


We have proposed the dopant-diffusion co-extrusion process for fabricating a graded-index polymer optical fiber (GI-POF). This process enabled to fabricate GI-POFs continuously, which dramatically improves the process cost of fabricating the GI-POFs, compared to the conventional preform method. According to the Fick's first law of diffusion, the refractive index distribution of the prepared GI-POF was initially expected to have a tail part at the core-cladding boundary. However, it was revealed that the GI-POF did not actually have this type of profile. Furthermore, it was confirmed that the refractive index profiles were controlled to the optimized index profile by changing the temperature of the diffusion zone.

Original languageEnglish
Pages (from-to)71-76
Number of pages6
JournalNonlinear Optics Quantum Optics
Issue number1-4 SPEC. ISS.
Publication statusPublished - 2005 Dec 19


  • Co-extrusion
  • Dopant-diffusion
  • Optical Fiber
  • Pick's Diffusion law
  • Polymer
  • Refractive Index Profile

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Instrumentation


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