Fig. 1. Schematic of proposed Brillouin random fiber laser system with active fiber-based Rayleigh scattering

Fig. 2. Comparison of distributed feedback and Rayleigh scattering spectra of LCEDF and SMF. (a) Comparison of distributed Rayleigh scattering of 25 m LCEDF with P₉₈₀ of 400 mW and 30 m SMF; (b) reflection spectra of LCEDF with P₉₈₀ of 0 mW, 100 mW, 200 mW, 300 mW, and 400 mW and 20 km SMF

Fig. 3. Characteristics of BRFL laser output. (a) Output spectra under different 980 nm laser pump powers P₉₈₀; (b) output RF spectra based on the LCEDF random feedback and the fiber mirror feedback

Fig. 4. RINs of the BRFLs under different feedback fibers

Fig. 5. Frequency jitter and its distribution probability of BRFL based on different feedback fibers. (a) LCEDF with P₉₈₀ of 400 mW; (b) 20 km SMF

Fig. 6. Distribution of Parisi overlapping parameter q_αβ of BRFL with the LCEDF under different P₉₈₀. (a) 100 mW; (b) 200 mW; (c) 300 mW; (d) 400 mW