Xining Xu, Yongjun Chen. Curvature Sensing Measurement Based on Seven-Core Fiber and Few-Mode Fiber Splicing Structure[J]. Acta Optica Sinica, 2019, 39(3): 0306001
- Acta Optica Sinica
- Vol. 39, Issue 3, 0306001 (2019)
Fig. 1. Structural diagram of curvature sensor
Fig. 2. Microscope images of cross section. (a) FMF; (b) SCF
Fig. 3. Structural diagrams and microscope images of different sensing heads.(a) Straight type;(b) same direction mismatch type;(c) different direction mismatch type; (d) microscope image of straight type; (e) microscope image of mismatch type
Fig. 4. Test results of sensor A. (a) Optical spectrum; (b) frequency spectrum
Fig. 5. Test results of sensor B. (a) Optical spectrum; (b) frequency spectrum
Fig. 6. Test results of sensor C. (a) Optical spectrum; (b) frequency spectrum
Fig. 7. Schematic of experimental setup
Fig. 8. Experimental results of sensor A. (a) Spectrum versus curvature; (b) data fitting results
Fig. 9. Experimental results of sensor B. (a) Spectrum versus curvature; (b) data fitting results
Fig. 10. Experimental results of sensor C. (a) Spectrum versus curvature; (b) data fitting results
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Table 1. Sensing sensitivity comparison among different splicing methods
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Table 2. Sensor sensitivity comparison for different sensing structures
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