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Shear stress sensing with Bragg grating-based sensors in microstructured optical fibers

Publication date 2013
B-Phot Authors Thomas Geernaert, Hugo Thienpont, Francis Berghmans
DOI 10.1364/OE.21.020404
Citation
S. Sulejmani et al., “Shear stress sensing with Bragg grating-based sensors in microstructured optical fibers,” Opt. Express, vol. 21, no. 17, pp. 20404–20416, 2013.
Abstract We demonstrate shear stress sensing with a Bragg grating-based microstructured optical fiber sensor embedded in a single lap adhesive joint. We achieved an unprecedented shear stress sensitivity of 59.8 pm/MPa when the joint is loaded in tension. This corresponds to a shear strain sensitivity of 0.01 pm/mu epsilon. We verified these results with 2D and 3D finite element modeling. A comparative FEM study with conventional highly birefringent side-hole and bow-tie fibers shows that our dedicated fiber design yields a fourfold sensitivity improvement.
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