Fulu Liu, Yumin Zhang, Wei Zhuang, Fei Luo, Lianqing Zhu. Fiber Temperature Sensor with Composite Structure Based on Vernier Effect and Substrate Sensitization[J]. Acta Optica Sinica, 2021, 41(15): 1506002
- Acta Optica Sinica
- Vol. 41, Issue 15, 1506002 (2021)
Fig. 1. Schematic diagram of cascaded FPI+FBG temperature sensor
Fig. 2. Simulated temperature responses of CFPIs based on single air cavity, glass-cavity, and cascaded cavities. (a) Single air cavity; (b) glass-cavity; (c) cascaded cavities
Fig. 3. BPM simulation diagram of the SMF-HCF-SMF structure
Fig. 4. Relationship between temperature sensitivity and parameter M
Fig. 5. Simulation of heat transfer on aluminum alloy substrates
Fig. 6. Simulation of thermal expansion of aluminum alloy substrates
Fig. 7. Diagram of sensor fabrication process
Fig. 8. Microscope pictures of the fiber optic sensing section
Fig. 9. Sensor calibration diagram
Fig. 10. Reflectance spectrogram of the sensor
Fig. 11. Temperature fit curves for FBG and cascaded FPI. (a) FBG; (b) cascaded FPI
Fig. 12. Temperature repeatability error box line diagrams for FBG and cascaded FPI. (a) FBG; (b) cascaded FPI
Fig. 13. Relationship between sensor response time and sensor time constant
Fig. 14. Comparison of ordinary FBG and post-interference FBG reflection spectra
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