Refractive index sensing using V-shaped polymer optical fibers

Heeyoung Lee, Neisei Hayashi, Yosuke Mizuno, Kentaro Nakamura

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Although polymer optical fiber (POF) tapers with high flexibility have been used to measure the refractive indices (RIs) of liquids, their fabrication have caused some inconvenience including the need to use external heat sources or chemicals. Here, as an alternative, we develop a simple, secure, and low-cost method of measuring RIs of liquids using V-shaped bent POFs. When the bending angle is 120° (experimentally optimized), with increasing RI, the transmitted power increases almost linearly with a dependence coefficient of approximately 210 dB/RI unit.

Original languageEnglish
Article number118001
JournalJapanese Journal of Applied Physics
Issue number11
Publication statusPublished - 2015 Nov
Externally publishedYes

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy


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