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水声三波混频过程研究
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作者 胡诗涌 《声学与电子工程》 2025年第2期1-6,31,共7页
+++为了研究水下三个特定频率声波间的非线性互作用过程,以广义的Burgers方程作为基本模型,借鉴非线性光学中的方法对该过程的声场空间分布进行分析求解,导出了该过程的Manley-Rowe关系式,提出了不同频率声波间能量转换效率的概念。研... +++为了研究水下三个特定频率声波间的非线性互作用过程,以广义的Burgers方程作为基本模型,借鉴非线性光学中的方法对该过程的声场空间分布进行分析求解,导出了该过程的Manley-Rowe关系式,提出了不同频率声波间能量转换效率的概念。研究表明,声场能量在最高频率声波与其他两列声波之间周期性来回转移,不同波阵面扩展情况下,声场能量随传播距离的变化分别呈现不同的周期性变化特点,平面波扩展时,能量转换效率与最高频率声波的能量同步达到极值。该文的研究可为解决水下低频声场的调控提供一条新思路。 展开更多
关键词 广义的Burgers方程 非线性光学 manley-rowe关系式 能量转换效率 声场能量 周期性变化
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Polarization Simultons in CARS by Polaritons:Energy and Velocity
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作者 Vladimir Feshchenko Galina Feshchenko 《Journal of Applied Mathematics and Physics》 2025年第9期3173-3185,共13页
This paper is the continuation of our previous study on the propagation of temporary simultons in dipole-active crystals in the case of Coherent Anti-Stokes Raman Scattering(CARS),in which the possibility of the forma... This paper is the continuation of our previous study on the propagation of temporary simultons in dipole-active crystals in the case of Coherent Anti-Stokes Raman Scattering(CARS),in which the possibility of the formation of simultons at all frequencies of interacting waves is considered.The present research considered the energy carried by the waves(the Manley-Rowe relation)and its relationship with the simultons’velocity.The cause of such study is twofold:some crystals(for instance a cubic crystal)owing to deformation of the dielectric constant by the pumping field become anisotropic and as such proper polarization appear;since the soliton’s velocity depends on initial conditions and initial conditions here are the stimulated Raman scattering,it is important to find the relationship between the one of the most significant factors of that scattering which is the Raman gain factor and soliton’s velocity. 展开更多
关键词 Coherent Anti-Stokes Raman Scattering POLARITONS PHONONS SOLITONS POLARIZATION manley-rowe Relation
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