Fig. 1. Experimental setup of a tunable multiwavelength Brillouin random fiber laser

Fig. 2. Self excited oscillation of random laser at 1530 nm band

Fig. 3. Output spectra of the random lasers at different 980 nm pump powers with BP power fixed at 7.4 dBm

Fig. 4. Output spectrum of the random laser at 980 nm with pump power of 500 mW

Fig. 5. Output spectra of the random laser under different BP powers at 980 nm with pump power fixed at 500 mW

Fig. 6. Wavelength number under different BP powers at 980 nm with pump powers at 300 mW and 500 mW

Fig. 7. Random laser output spectra of different BP wavelengths

Fig. 8. Wavelength number obtained from the random laser in the tuning range

Fig. 9. Multiwavelength output results with 7.4 dBm BP power and 500 mW pump power of 980 nm laser