Influence of medium parameters on the characteristics of stimulated Brillouin scattering

SBS process was simulated numerically based on a one-dimensional transient model. The influence of Brillouin media on SBS characteristics was studied. A variety of media, such as FC-72, FC-75, CCl4, CS2, Acetone, Benzene, and mixture liquid of CCl4/Ethanol, are investigated experimentally with a Nd∶YAG Q-switched laser, and comparison is made between the SBS characteristics, such as the SBS pulse-width, the energy reflectivity and the SBS pulse shape. It is shown that a large gain factor corresponds to a small absorption coefficient and a large SBS energy reflectivity; a large absorption coefficient corresponds to a short SBS pulse-width; and a short phonon lifetime corresponds to a short SBS rise time. The modulation of SBS pulse shape tends to occur with a short phonon lifetime.