Lin Zhao, Jinlai Feng, Zeyu Zou, Fengjun Guo, Changfeng Zhang, Jinyu Wang, Jiqiang Wang. Research on Single Grating Semi-Coated Temperature and Humidity Sensing Technology[J]. Laser & Optoelectronics Progress, 2022, 59(7): 0705001
- Laser & Optoelectronics Progress
- Vol. 59, Issue 7, 0705001 (2022)
Fig. 1. Coating structure of single grating temperature and humidity sensor
Fig. 2. Physical image of the photoelectric microscope
Fig. 3. Semi-coated grating and coating effect
Fig. 4. Principle of the experimental test platform
Fig. 5. Reflectance spectra of the FBG at different temperatures
Fig. 6. Gaussian fitted curve of uncoated grating peak
Fig. 7. Variation curve of temperature with wavelength
Fig. 8. Calculation of spectral area
Fig. 9. Relationship between curve area and temperature
Fig. 10. Reflectance spectra of grating under different humidity
Fig. 11. Function curve of spectral area and relative humidity
Fig. 12. Repeatability test of the humidity
Fig. 13. Variation curve of humidity response with time
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Table 1. Parameter of the FBG
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Table 2. Parameter of CF-1000 temperature and humidity generator
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Table 3. Temperature and humidity detection results of the sensor
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