In chapter 3, spatiotemporal instability of ultrashort pulses results from the interplay among diffraction, group-velocity dispersins and nonlinearity.
第三章：超短脉冲的时空不稳定性是衍射、群速度色散和自相位调制三者之间的相互作用导致的。
参考来源 - 强激光的调制不稳定性理论研究·2,447,543篇论文数据，部分数据来源于NoteExpress
基于非线性包络方程我们研究了平面非线性介质波导中的时空不稳定性，得到了有拉曼散射效应情形下不稳定性调制的增益谱的表达式。
Spatiotemporal instability in the planar nonlinear dielectric waveguide is analyzed by nonlinear equation, and the expression of Modulation instability(MI) gain in Raman Scattering is obtained.
通过对模型进行线性稳定性分析，发现这些时空斑图是由于短波不稳定性所引起的。
It is found that these pattern are caused by short-wave instability through the linear stability analysis.
结论：快速刺激诱发的室颤存在时空的不稳定性。
Conclusion: Spatiotemporal instability exists in VF induced by rapid pacing.
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