Strain dependence of perfluorinated polymer optical fiber Bragg grating measured at different wavelengths

Ryo Ishikawa, Heeyoung Lee, Amédée Lacraz, Antreas Theodosiou, Kyriacos Kalli, Yosuke Mizuno, Kentaro Nakamura

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We measure the strain dependence of multiple Bragg wavelengths (corresponding to different diffraction orders) of a fiber Bragg grating (FBG) inscribed in a perfluorinated graded-index polymer optical fiber (PFGI-POF) in the wavelength range up to 1550 nm. On the basis of this result, we show that the fractional sensitivity, which has been conventionally used as a wavelength-independent index for fair comparison of the FBG performance measured at different wavelengths, is dependent on wavelength in this range. The reason for this behavior seems to originate from the non-negligible wavelength dependence of refractive index and its strain-dependence coefficient. Using the wavelength dependence of the refractive index already reported for bulk, we deduce the wavelength dependence of the strain coefficient of the refractive index. This information will be a useful archive in implementing PFGI-POF-based strain sensors based on not only FBGs but also Brillouin scattering in the future.

Original languageEnglish
Article number038002
JournalJapanese Journal of Applied Physics
Volume57
Issue number3
DOIs
Publication statusPublished - 2018 Mar
Externally publishedYes

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Strain dependence of perfluorinated polymer optical fiber Bragg grating measured at different wavelengths'. Together they form a unique fingerprint.

  • Cite this