Fig. 1. Schematic diagram of temperature sensitization package for fiber grating sensor

Fig. 2. Curves of relationship between temperature and central wavelength before and after package

Fig. 3. Block diagram of arrayed wave-guide grating demodulation system

Fig. 4. Schematic diagram of arrayed wave-guide grating demodulation with narrow-band light source

Fig. 5. Block diagram of demodulation circuit structure

Fig. 6. Curves of relationship between optical power and output voltage

Fig. 7. Output spectrum of arrayed wave-guide grating

Fig. 8. Diagram of light source and FBG reflection spectrum

Fig. 9. Curves of relationship between temperature and reflection spectrum power

Fig. 10. Curves of relationship between temperature and output voltage

Fig. 11. Curves of relationship between temperature and voltage during temperature rise

Fig. 12. Curves of relationship between temperature and voltage during temperature reduction

Fig. 13. Test results of multi-sensor