In order to further study characteristics relationship between stimulated Brillouin scattering and stimulated Raman scattering

the effects of different attenuation coefficient on stimulated Brillouin scattering to amplify stimulated Raman scattering in water pumped by single- mode laser is investigated in this paper. Due to threshold of SBS related with attenuation coefficient of water

when SBS worked as a new source to excite and enhance the SRS

the attenuation coefficient of water affects Amplification effect of SRS. The experimental results indicate that the smaller the attenuation coefficient

the higher the output energy of SBS

meanwhile the bigger the energy of BSRS.