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

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

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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

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