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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 29, Iss. 11 — Jun. 1, 2011
  • pp: 1714–1720

Temperature-Insensitive Fiber Bragg Grating Based Tilt Sensor With Large Dynamic Range

H. Y. Au, Sunil K. Khijwania, H. Y. Fu, W. H. Chung, and H. Y. Tam

Journal of Lightwave Technology, Vol. 29, Issue 11, pp. 1714-1720 (2011)


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Abstract

We present a novel and simple temperature-insensitive fiber Bragg grating (FBG) based smart tilt sensor. The sensor design is free from any inherent mechanical joints/frictions with a capability to measure magnitude as well as the direction of the inclination. The first design is with a sensitivity of 0.00282 nm/$^{\circ}$ in a very large dynamic range of ${\pm} 35^{\circ}$. The sensor response is optimized against design parameters and observed to be completely reversible. Since there is a strain discrepancy on individual FBGs of the first design, a modified design is then proposed for optimization. An excellent sensitivity of 0.0395 nm/$^{\circ}$, resolution of 0.013$^{\circ}$ and accuracy of 0.051$^{\circ}$ have been achieved. These features along with the freedom to tune the dynamic range, accuracy of measurement and the sensitivity of the proposed sensor to a desired operation range make the proposed sensor of extreme importance for practical engineering applications.

© 2011 IEEE

Citation
H. Y. Au, Sunil K. Khijwania, H. Y. Fu, W. H. Chung, and H. Y. Tam, "Temperature-Insensitive Fiber Bragg Grating Based Tilt Sensor With Large Dynamic Range," J. Lightwave Technol. 29, 1714-1720 (2011)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-29-11-1714

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