Thermal and chemical treatment of polymer optical fiber Bragg grating sensors for enhanced mechanical sensitivity

Andreas Pospori, C. A. F. Marques, D. Saez-Rodriguez, Kristian Nielsen, Ole Bang, D. J. Webb

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

An investigation of the thermal annealing effects on the strain, stress, and force sensitivities of polymer optical fiber Bragg grating sensors is performed. We demonstrate for the first time that the fiber annealing can enhance both stress and force sensitivities of Bragg grating sensors, with the possible cause being the molecular relaxation of the polymer when fiber is raised above the β-transition temperature. A simple, cost-effective, but well controlled method for fiber annealing is also presented in this work. In addition, the effects of chemical etching on the strain, stress, and force sensitivities have been investigated. Results show that fiber etching too can increase the force sensitivity, and it can also affect the strain and stress sensitivities of the Bragg grating sensors.
Original languageEnglish
JournalOptical Fiber Technology
Volume36
Pages (from-to)68-74
ISSN1068-5200
DOIs
Publication statusPublished - 2017

Keywords

  • POF
  • Bragg grating sensors
  • Annealing
  • Etching
  • Mechanical sensitivity

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