Fig. 1. Experimental setup of SBS pumped by a vortex beam. D, diffuser; L1, L2, lenses.

Fig. 2. Intensity profile of (a) the pump beam and (b) the SBS signal.

Fig. 3. Experimental intensity distributions of (a) the pump beam, (b) the received SBS signal, and (c) the mirror reflection beam formed after the tilted lens, respectively.

Fig. 4. Measured spectrum of Brillouin scattering in water.

Fig. 5. Measured pulse width of the laser beam and that of Brillouin scattering in water.

Fig. 6. (a) Speckle pattern recorded after the LSD; (b) the intensity profile of SBS generated in the SBS cell without the LSD.