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Recent experimental results on NIF revealed a much higher stimulated Brillouin scattering(SBS)and stimulated Raman scattering(SRS)backscatter than expected;one possible reason was due to the coherence between incident laser beams.In our research,two laser beams(~1 ns,~250 J,527 nm in each one)with different coherent degrees between them from the SG-II facility were employed to irradiate an Au plate target;the backscatter of SBS and SRS in the range of the given solid angle had been measured.The results showed that it could change dramatically corresponding to the difference of the coherent degree between the two laser beams,and there was usually more intense backscatter the higher the coherent degree between the incident beams.
Recent experimental results on NIF revealed a much higher stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS) backscatter than expected; one possible reason was due to the coherence between incident laser beams.In our research, two laser beams (~ 1 ns , ~ 250 J, 527 nm in each one) with different coherent degrees between them from the SG-II facility were employed to irradiate an Au plate target; the backscatter of SBS and SRS in the range of the given solid angle had been measured. The results said that it could change sharp to correspond to the difference of the coherent degree between the two laser beams, and there was usually more intense backscatter the higher the coherent degree between the incident beams.