Fig. 1. Schematic of the sensing structure of the FPI anemometer and spectra of FBG and FBG-FPI before cutting

Fig. 2. Experimental setup

Fig. 3. The influence of temperature on the interference spectra of anemometer

Fig. 4. Interference spectra of anemometers at 0 mW and 150 mW power

Fig. 5. Variation of peak wavelength with laser power in anemometers

Fig. 6. Interference spectra of FPI anemometers at 500 mW laser power and airflow velocity of 0 and 9 m/s

Fig. 7. Wavelength shift of the anemometers as a function of airflow velocity

Fig. 8. Sensitivity of the anemometer against airflow velocity