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

研究成果: Article査読

8 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号038002
ジャーナルJapanese Journal of Applied Physics
57
3
DOI
出版ステータスPublished - 2018 3月
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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