Abstract
We demonstrate a Fabry-Perot fiber cavity for strain measurement with highly improved sensitivity. The cavity is fabricated by the fusion splicing of two etched single-mode fibers with a core offset in the X axis or both X and Y axes. It is found that the strain sensitivity can be increased from 2.39 to 7.75pm/μe by adopting offset splicing. Such a Fabry-Perot cavity device is compact in size, simple in structure, easy in fabrication and of low cost, and has high potential in strain sensing.
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