Zixi LIN, Yuting LI, Yuqiang YANG, Yitong LI, Yuying ZHANG. Fiber optic temperature sensor based on enhanced harmonic vernier effect[J]. Optics and Precision Engineering, 2024, 32(15): 2344
- Optics and Precision Engineering
- Vol. 32, Issue 15, 2344 (2024)
Fig. 1. Schematic diagram of temperature sensor employing a cascade configuration of SI and FPI
Fig. 2. Variation of interference spectra of FPI and SI with temperature increased from T 0 to T 0+1 ℃
Fig. 3. Cascade interference changes of FPI and SI with temperature increased from T 0 to T 0+1 ℃
Fig. 4. Preparation process of FPI and SI
Fig. 5. Displacement spectrograms for single FPI and SIs
Fig. 6. Spectral shifts of cascade SI and FPI at 30 ℃ to 31 ℃
Fig. 7. Peak wavelength of SI and FPI interference spectra varies with temperature
Fig. 8. Temperature curves of SI and FPI cascaded interference spectra with different panda fiber lengths
Fig. 9. Spectrograms of sensors sample
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Table 1. Comparison of temperature sensor performance parameters based on vernier effect
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