Low loss and high bandwidth polystyrene-based graded index polymer optical fiber

Kenji Makino, Yoshihisa Akimoto, Kotaro Koike, Atsushi Kondo, Azusa Inoue, Yasuhiro Koike

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Polystyrene (PS) was selected as a costless polymer matrix for graded index polymer optical fibers (GI POFs) with low attenuation at a wavelength of 670 nm. However, fabricated PS-based GI POFs showed attenuation of more than 300 dB/km. This high attenuation PS-based GI POF had a quite broad molecular weight distribution. In contrast, a PS-based GI POF with a narrow molecular weight distribution showed low attenuation of around 160 dB/km. This is because the refractive index of PS, different from general polymers, is greatly affected by the molecular weight. The PS-based GI POF showed the high thermal stability of this low loss performance at a temperature of 70°C, despite the low glass transition temperature caused by plasticization. The measured refractive index profile was near optimum (g=2.5), and a high bandwidth of 5.8 GHz for a 50 m length was obtained.

Original languageEnglish
Article number6525378
Pages (from-to)2407-2412
Number of pages6
JournalJournal of Lightwave Technology
Issue number14
Publication statusPublished - 2013


  • Attenuation
  • graded index polymer optical fiber (GI POF)
  • molecular weight
  • refractive index
  • thermal stability

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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