Brillouin frequency shift dependence on water absorption in plastic optical fibers

K. Minakawa, K. Koike, N. Hayashi, Y. Koike, Y. Mizuno, K. Nakamura

Research output: Contribution to conferencePaperpeer-review

Abstract

We study the dependence of Brillouin frequency shift (BFS) on water-absorption ratio in poly(methyl methacrylate)-based plastic optical fibers (POFs) to clarify the effect of the humidity on the POF-based Brillouin sensors. The BFS decreases monotonically as the water-absorption ratio increases, probably because of the decrease in the Young's modulus. At the same water-absorption ratio, the BFS change basically becomes larger with increasing temperature. The maximal BFS changes (absolute values) at 40, 60, and 80 °C are 158, 285, and 510 MHz (corresponding to the temperature changes of approximately 9, 16, and 30 °C), respectively. Therefore, some countermeasure against humidity is indispensable in implementing strain/temperature sensors based on Brillouin scattering in POFs especially at higher temperature. On the other hand, Brillouin-based distributed humidity sensors can be developed by exploiting the BFS dependence on water absorption in POFs.

Original languageEnglish
Pages244-247
Number of pages4
Publication statusPublished - 2015
Event24th International Conference on Plastic Optical Fibers, POF 2015 - Nuremberg, Germany
Duration: 2015 Sep 222015 Sep 24

Other

Other24th International Conference on Plastic Optical Fibers, POF 2015
Country/TerritoryGermany
CityNuremberg
Period15/9/2215/9/24

Keywords

  • Brillouin frequency shift
  • Brillouin scattering
  • Plastic optical fiber sensors
  • Strain/temperature sensing
  • Water absorption

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

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