Fig. 1. Three-channel F-P etalon

Fig. 2. Spectrogram of transmittance curve

Fig. 3. Relationship between three-channel F-P etalon transmittance and surface irregularity as well as surface accuracy

Fig. 4. Schematic diagram of testing device

Fig. 5. Crosstalk coefficients of four channels

Fig. 6. Crosstalk coefficients of two Y-type optical fibers

Fig. 7. Relationship between crosstalk coefficients as well as errors and measurement times

Fig. 8. Correction coefficients of four pulses

Fig. 9. Correction coefficients of two Y-type optical fibers

Fig. 10. Frequency-voltage tuning coefficients under different tuning voltages and tuning modes

Fig. 11. Displacement response curves of PZT with different voltage modes

Fig. 12. Three-channel transmittance of F-P etalon module varies with driving voltage

Fig. 13. Three-channel transmittance of F-P etalon frequency discrimination module varies with driving voltage

Fig. 14. Three-channel peak transmittance and full width at half maximum of F-P etalon frequency discrimination module

Fig. 15. Three-channel transmittance of F-P etalon frequency discrimination module varies with driving voltage

Fig. 16. Three-channel peak transmittance and full width at half maximum of F-P etalon frequency discrimination module

Fig. 17. Relationship between wind speed error as well as wind speed range and FP plate spacing

Fig. 18. Corresponding relationship between wind speed accuracy and different wind speed conditions

Fig. 19. Relationship between transmittance and derivative curves

Fig. 20. Schematic of closed-loop feedback control system

Fig. 21. Hybrid laser wind lidar prototype

Fig. 22. Observation results of 2 km~10 km wind field