双折射光纤中行走孤子的变分方法
Variational approach for walking solitons in birefringent fibres
摘要：
我们使用变分法获得近似的解析表达式时，在两个组件之间的相速度和群速度的差异和快速振荡项考虑双折射光纤中的稳态脉冲状的解决方案。在检验近似的有效性后，我们研究了孤子脉冲形状如何依赖于它的速度和非线性传播常数。通过数值求解传播方程，我们发现这些定态解大多数是稳定的。
英文摘要：
We use the variational method to obtain approximate analytical expressions for the stationary pulselike solutions in birefringent fibers when differences in both phase velocities and group velocities between the two components and rapidly oscillating terms are taken into account. After checking the validity of the approximation we study how the soliton pulse shape depends on its velocity and nonlinear propagation constant. By numerically solving the propagation equation we have found that most of these stationary solutions are stable.
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