Jing ZHANG, Yongqian LI. High-sensitivity refractive index sensor based on FMF-CLF-FMF optical fiber structure[J]. Journal of Applied Optics, 2023, 44(2): 462
- Journal of Applied Optics
- Vol. 44, Issue 2, 462 (2023)
Fig. 1. Structure diagram of sensor
Fig. 2. Cross section and refractive index distribution of FMF
Fig. 3. Physical drawing of packaged sensor
Fig. 4. Analysis of optical transmission mode
Fig. 5. Schematic diagram of experimental system
Fig. 6. Physical drawing of experimental system
Fig. 7. Transmission spectra at different temperatures
Fig. 8. Linear fitting of temperature and wavelength
Fig. 9. Repeatability error of temperature measurement
Fig. 10. Transmission spectra with different refractive indices
Fig. 11. Linear fitting of external refractive index and MZI resonance wavelength
Fig. 12. Repeatability error of refractive index measurement
Fig. 13. Actual measurement spectrum of sensor
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Table 1. Actual measurement results and errors of sensor
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Table 2. Comparison of sensitivity of different structures
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