Honghai Wang, Simin Peng, Xin Gui, Changjia Wang, Zhengying Li. High-Sensitivity Fiber Bragg Grating Strain Sensor Based on Singlemode-Multimode-Singlemode Tapered Structure[J]. Laser & Optoelectronics Progress, 2019, 56(13): 132802
- Laser & Optoelectronics Progress
- Vol. 56, Issue 13, 132802 (2019)
Fig. 1. Schematic of fiber fused taper
Fig. 2. Structural schematic of STMS-FBG
Fig. 3. Reflection spectra of STMS-FBG
Fig. 4. Schematic of strain experimental setup
Fig. 5. Diagrams of strain responses. (a) Reflective spectral responses under different strains; (b) fitting curves of strain sensitivity for sensors with different tapered lengths
Fig. 6. Fitting curves of strain sensitivity for different FBG segments
Fig. 7. Fiber radii at different locations in cone zone. (a) First segment; (b) seventh segment
Fig. 8. Diagrams of temperature responses. (a) Reflective spectral responses at different temperatures; (b) fitting curve of temperature sensitivity
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Table 1. Comparison of indexes of proposed STMS-FBG sensors and those in previously related reports
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Table 2. Strain sensitivities of fibers with different radii in cone zone
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