Fig. 1. Schematic of MPF based on SBS

Fig. 2. Effect of SBS of pump light at different positions on signal light (left) and corresponding filter response (right). (a) Single-passband filter realized by SBS gain region; (b) dual-passband filter realized by both SBS gain and loss regions; (c) single-passband filter realized by SBS loss region

Fig. 3. Single-passband filter realized by SBS gain region

Fig. 4. Dual-passband filter with its interval reduced

Fig. 5. Dual-passband filter with its interval expanded

Fig. 6. Single-passband filter realized by SBS loss region

Fig. 7. SBS with gain region located in lower sideband range. (a) Spectra; (b) single-passband filter realized by SBS gain region

Fig. 8. Gain and loss regions located in upper and lower sideband ranges, respectively. (a) Spectra; (b) dual-passband filter with its interval reduced; (c) dual-passband filter with its interval expanded

Fig. 9. SBS with loss region located in upper sideband range. (a) Spectra; (b) single-passband filter realized by SBS loss region