Fiber Bragg grating accelerometer based on a transversely rotating stick

Kuo Li, Tommy H.T. Chan, Man Hong Yau, David P. Thambiratnam, Hwa Yaw Tam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

Fiber Bragg Grating (FBG) accelerometers using transverse forces with an inertial object placed at the middle of the FBG have a high sensitivity but low resonant frequency. The resonant frequency 26 Hz and sensitivity at 6 Hz 1.29 nm/g were reported based on a 50 mm-long FBG accelerometer. We demonstrate that the first FBG accelerometer based on a transversely rotating stick, which can, at the same or even larger size, keep the high sensitivity and significantly increase the low resonant frequency. In our experiments, a 77.5 mm-long FBG accelerometer has achieved a similar sensitivity but 65% higher resonant frequency. This novel structure not only significantly widens the potential applications of FBG accelerometers by increasing their resonant frequencies but also provides a new route to design other accelerometers, e.g. micro accelerometers.
Original languageEnglish
Pages (from-to)4337-4341
Number of pages5
JournalOptik
Volume126
Issue number23
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • Accelerometer
  • Fiber Bragg grating
  • Fiber optics sensor

ASJC Scopus subject areas

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

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