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Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
Tapered Fiber Bragg Grating Fabry-Pérot Cavity for Sensitivity-Enhanced Strain Sensing
Jinchen Zhang1, Chao Wang2, Rui Dai2
1Guangxi Key Laboratory of Nuclear Physics and Technology, College of Physics Science and Technology, Guangxi Normal University, Guilin 541004, China.
None:
This paper presents a novel optical fiber axial strain sensor based on a Fabry-Perot interferometer (FPI) cavity incorporating Fiber Bragg Gratings (FBGs) and a tapered fiber, which has been experimentally validated. The sensor structure primarily consists of two identical FBGs with a bi-conical tapered fiber segment between them, achieving a strain sensitivity of 13.19 pm/με. This represents a 12-fold enhancement compared to conventional FBG-FPI, along with a resolution limit of 3.7 × 10-4 με. The proposed sensor offers notable advantages including low fabrication cost, compact structure, and excellent linearity, demonstrating significant potential for high-precision axial strain measurement applications.
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