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静磁波变分计算与磁光Bragg衍射效率的提高
张生
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采用变分方法分析了垂直偏置磁场横向不均匀时掺Bi的YIG薄膜中微波静磁正向体波的激发和传播特性。计算了静磁正向体波对导波光的衍射效率，在静磁波的线性激发范围内计算结果与实验符合很好。处理方法可为线性磁光Bragg器件的优化设计提供理论指导。
The generation and propagation of Magnetostatic Forward Volume Waves (MSFVWs) in the Bi-doped YIG film under transversely nonuniform bias magnetic fields are analyzed using the variational approach. The diffraction efficiency of the guided optical waves with the MSFVWs is calculated and the theoretical results are in good agreement with the experimental data in the excitation range of linear MSFVWs. This analytic procedure may be applied to the optimization design for the linear MSFVW-based Bragg cells.
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