Abstract: Stimulated Brillouin Scattering (SBS) is one of important nonlinear optical effects in optical fiber transmission system, it limits the optical power that can be transmitted through fiber. If input optical power is over SBS threshold, part of power will be changed to backward Stokes wave, this process exacerbates the system transmission characteristic very much. In this paper, SBS effect was systematically studied by experiments. Firstly, backward Stokes wave was observed, we investigated its spectrum and frequency shift to pumping signal wave. Then, the relationship of SBS threshold characteristic with linewidth of light source and modulation formats was discussed, and approved by experiments. The impact on bite error rate characteristic of system due to SBS was also investigated experimentally. !6
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