Fig. 1. Schematic diagram of dispersion-tuned actively mode-locked fiber laser

Fig. 2. Relation between lasing wavelength and measurement frequency

Fig. 3. Measurement range and measurement sensitivity at different cavity length, N=380, D_total =-995.6 ps/nm

Fig. 4. Measuerment sensitivity at different mode-locked order, L=300 m, D_total=-600 ps/nm

Fig. 5. Measurement sensitivity at different total dispersion with cavity length, L= 10 m, 50 m, 500 m, 1 500 m and 3 000 m, N=260

Fig. 6. Measurement sensitivity at different total dispersion and cavity length with different mode-locked oeder,N₁=10, N₂=80,

Fig. 7. Schematic diagram of frequency measurement setup based on DCF

Fig. 8. Spectra and relation between lasing wavelength and measurement frequency based on DCF

Fig. 9. Schematic diagram of the proposed frequency measurement setup based on LC-FBG

Fig. 10. Spectra and relation between lasing wavelength and measurement frequency based on LC-FBG