Bend measurement with chirp of fiber Bragg grating

  • Dong X
  • Meng H
  • Liu Z
 et al. 
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The first measurements of curvature with chirp of fiber Bragg grating are described. The grating is\r bonded at a slant onto the lateral surface of a beam and chirped by the bend-induced strain\r gradient. The bandwidth of the grating is proportional to the curvature of the beam and independent\r of temperature, resulting in a curvature measurement with a resolution of 0.036 m -1 within the\r range of 4 m -1 . Simultaneously, the thermal response of the central Bragg wavelength provides a\r temperature measurement within the range of 0-45 °C.

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