Modulation instability in fiber grating with nonlinearity management is studied based on the nonlinear coupled-mode equations. The dispersion relation for modulation instability is obtained.
基于非线性耦合模方程，研究了非线性管理光纤光栅中的调制不稳定性，得到了调制不稳定性的色散关系。
Since relativistic effect excites the transverse electric mode in the waveguide, the coupled nonlinear equations have been derived from the beam frame.
由于相对论效应在波导中激起横电模式，我们在轴向波数和轴向电子速度为零的坐标系中导出了非线性耦合方程。
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