High sensitivity polymer optical fiber-bragg-grating-based accelerometer

Alessio Stefani, Søren Andresen, Wu Yuan, Nicolai Herholdt-Rasmussen, Ole Bang

Research output: Contribution to journalArticlepeer-review

Abstract

We report on the fabrication and characterization of the first accelerometer based on a polymer optical fiber Bragg grating (FBG) for operation at both 850 and 1550 nm. The devices have a flat frequency response over a 1-kHz bandwidth and a resonance frequency of about 3 kHz. The response is linear up to at least 15 g and sensitivities as high as 19 pm/g (shift in resonance wavelength per unit acceleration) have been demonstrated. Given that 15 g corresponds to a strain of less than 0.02% and that polymer fibers have an elastic limit of more than 1%, the polymer FBG accelerometer can measure very strong accelerations. We compare with corresponding silica FBG accelerometers and demonstrate that using polymer FBGs improves the sensitivity by more than a factor of four and increases the figure of merit, defined as the sensitivity times the resonance frequency squared.

Original languageEnglish (US)
Article number6152135
Pages (from-to)763-765
Number of pages3
JournalIEEE Photonics Technology Letters
Volume24
Issue number9
DOIs
StatePublished - 2012

Keywords

  • Accelerometer
  • fiber Bragg grating
  • optical fiber sensor
  • polymer optical fiber

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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