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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 5,
  • Issue 9,
  • pp. 507-508
  • (2007)

Fiber Bragg grating pressure sensor with enhanced sensitivity

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Abstract

A novel fiber Bragg grating (FBG) pressure sensor with the enhanced sensitivity has been demonstrated. A piston-like diaphragm with a hard core in the center is used to enhance the sensitivity. Both the theoretical analysis and the experimental result show that the radius of the hard core has significant effect on the pressure sensitivity. When the radius of the hard core is 1.5 mm, a pressure sensitivity of 7.23 nm/MPa has been achieved.

© 2007 Chinese Optics Letters

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