Yuqiang YANG, Yuying ZHANG, Yuting LI, Jiale GAO, Xiaoguang MU, Lei BI. Fiber Optic Temperature Sensor Based on Harmonic Vernier Effect of Sagnac Interferometer[J]. Acta Photonica Sinica, 2024, 53(4): 0406004
- Acta Photonica Sinica
- Vol. 53, Issue 4, 0406004 (2024)
Fig. 1. Schematic of the sensor
Fig. 2. Interference spectra of normal Vernier effect
Fig. 3. Interference spectra of first-order harmonic Vernier effect
Fig. 4. Interference spectra of second-order harmonic Vernier effect
Fig. 5. Interference spectra of individual SI1 and SI2
Fig. 6. Parallel interference spectra of SI1 and SI2 at temperatures T0 °C and T0+1 °C
Fig. 7. Interference spectra of individual SI1 and SI2
Fig. 8. Parallel interference spectra of SI1 and SI2 at temperatures of 40 °C and 41 °C
Fig. 9. Peak wavelength /cross-point of the spectrum versus temperature
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Table 1. Comparison of the parameters corresponding to the normal and harmonic Vernier effects
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