Jiahao Guo, Quanbin Huang, Siping Lian, Dezhi Liang, Yongqin Yu, Chenlin Du, Shuangchen Ruan. Probe-Type Pressure Sensor Based on Thin-Walled Grapefruit Microstructured Fiber[J]. Acta Optica Sinica, 2021, 41(13): 1306015
- Acta Optica Sinica
- Vol. 41, Issue 13, 1306015 (2021)
Fig. 1. Microscope image of the cross section of TW-GMF
Fig. 2. Simulation modeling diagram. (a) Schematic diagram of a triangular element; (b) devision of triangular mesh in FEM
Fig. 3. Mode field distributions of core mode of simulated TW-GMF at 1550 nm. (a) LP01(x), n1=1.46057; (b) LP01(y), n2=1.46055 ; (c) LP11, n3=1.45759; (d) LP11, n4=1.45754; (e) LP11, n5=1.45693; (f) LP11, n6=1.45688
Fig. 4. Refractive index curves of core mode of simulated TW-GMF. Insert is the enlarged view of refractive index curves of LP01(x) and LP01(y) modes
Fig. 5. Variation curve of mode loss of GMF with wavelength
Fig. 6. Schematic diagram of reflecting modal interference structure based on refractive index guided TW-GMF
Fig. 7. Image of sensor structure under microscope. Image on the right is the local magnification of fusion point
Fig. 8. Reflection spectra of GMF sensors with different lengths. (a) L=2 cm; (b) L=5 cm; (c) L=7 cm
Fig. 9. Schematic diagram of experimental setup for pressure sensing measurement
Fig. 10. Pressure sensing characteristics of GMF sensors with different lengths
Fig. 11. Response stability of GMF sensor wavelength to pressure when switching between different pressures
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