Twist dependencies of strain and temperature sensitivities of perfluorinated graded-index polymer optical fiber Bragg gratings

Yosuke Mizuno, Tianyi Ma, Ryo Ishikawa, Heeyoung Lee, Antreas Theodosiou, Kyriacos Kalli, Kentaro Nakamura

Research output: Contribution to journalArticle

Abstract

We measure the twist dependence of the reflected spectrum of a fiber Bragg grating (FBG) inscribed in a perfluorinated graded-index (PFGI) polymer optical fiber (POF). With increasing twist, the strain sensitivity decreases with a coefficient of -34.2 pm/%/turns/m, while the temperature sensitivity increases with a coefficient of 0.39 pm/°C/turns/m. At a twist of 150 turns m-1, the temperature sensitivity is 3 times higher than that with no twist. The controllability of the strain and temperature coefficients without considerable cost is beneficial not only to highly sensitive temperature sensing but also discriminative sensing of strain and temperature using two PFGI-POF-FBGs.

Original languageEnglish
Article number082007
JournalApplied Physics Express
Volume12
Issue number8
DOIs
Publication statusPublished - 2019 Aug 1
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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