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结合静态流体力学理论、弦振动理论及瞬态受激布里渊散射(SBS)理论,建立了描述介质纵向振动所产生的附加密度变化的受激布里渊散射耦合模型。以四氯化碳为介质,研究了不同强度的基频及倍频振动对受激布里渊散射反射率以及波形失真度的影响特征。结果表明,振动对于受激布里渊散射的影响具有一定的阈值性。在低于某一阈值情况下,受激布里渊散射稳定性不受其影响,且受激布里渊散射的振动稳定性在很大程度上受控于受激布里渊散射装置的结构参数。在介质振动强度恒定的情况下,选取短焦透镜及短池长的装置结构更有利于受激布里渊散射相位共轭镜稳定性的提高。
Combined with the theory of static fluid mechanics, the theory of string vibration and the theory of transient stimulated Brillouin scattering (SBS), a coupled model of stimulated Brillouin scattering, which describes the additional density change caused by the longitudinal vibration of media, is established. Using carbon tetrachloride as a medium, the effects of different intensities of fundamental frequency and doubled frequency vibration on the reflectivity of stimulated Brillouin scattering and waveform distortion were studied. The results show that the vibration has a certain threshold to the stimulated Brillouin scattering. Below a certain threshold, the stability of stimulated Brillouin scattering is unaffected, and the vibration stability of stimulated Brillouin scattering is largely controlled by the structure of the stimulated Brillouin scattering device parameter. In the case of constant medium vibration, the short focal length lens and short cell length structure are more conducive to the stability of stimulated Brillouin scattering phase conjugate mirror.