Near-forward Stimulated Brillouin Scattering
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چکیده
LLE Review, Volume 72 177 In stimulated Brillouin scattering1 (SBS) an incident (pump) light wave is scattered by the electron-density fluctuations associated with an ion-acoustic (sound) wave. This process generates a frequency-upshifted (anti-Stokes) light wave and a frequency-downshifted (Stokes) light wave. For most scattering angles the anti-Stokes wave is driven nonresonantly and can be neglected a priori. The resulting instability is referred to as three-wave SBS. However, for near-forward scattering the anti-Stokes wave can be driven near-resonantly and must be retained in the instability analysis. When the role of the antiStokes wave is significant, the resulting instability is referred to as four-wave SBS.
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