Lijuan ZHAO, Yujing WU, Zhiniu XU, Qi LIU. Modelling Study of a High Sensitivity Sagnac Temperature Sensor Based on Photonic Crystal Fiber[J]. Acta Photonica Sinica, 2023, 52(2): 0206004
- Acta Photonica Sinica
- Vol. 52, Issue 2, 0206004 (2023)
Fig. 1. Schematic of the Sagnac interferometer temperature sensor
Fig. 2. Cross section of optical fiber
Fig. 3. PCF mode field distribution
Fig. 4. Effect of b1 on effective refractive index and birefringence
Fig. 5. Variation of birefringence with temperature
Fig. 6. Effect of d1 on birefringence and fiber birefringence temperature sensitivity
Fig. 7. Variation of birefringence with wavelength before and after filling with ethanol
Fig. 8. Liquid filling method
Fig. 9. Variation of birefringence with temperature corresponding to different filling methods
Fig. 10. Variation of birefringence corresponding to filling different temperature sensitive liquids with temperature
Fig. 11. Different combinations of structural parameters correspond to birefringence
Fig. 12. Variation of birefringence with temperature for fibers with different structural parameters under different filling methods
Fig. 13. The transmission spectrum with different temperature
Fig. 14. Relationship between concave point wavelength and temperature
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Table 1. Corresponding sensitivity and goodness of fit for different temperature-sensitive liquids
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Table 2. Combination methods and their corresponding fiber birefringence temperature sensitivity
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Table 3. Comparison with existing typical Sagnac temperature sensor
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