论文标题
分散型多模纤维中的时空孤子
Spatiotemporal solitons in dispersion-managed multimode fibers
论文作者
论文摘要
我们开发了多模光纤中三维（3D）孤子的分散管理方案（DM）。它是由抛物线限制在横向平面上作用与立方自我关注的抛物线作用的模型。 DM图以具有异常和正常组速度分散的交替段的形式采用。以前，在单模纤维中详细研究了颞型DM孤子，并且在平面波导的模型中发现了2D时空“轻子弹”的某些解决方案。通过数值方法，我们证明了3D时空孤子的稳定性由通常的DM-STRENGTH参数（$ s $：quasi-stable）确定，它们在$ s <s_ {0} \大约0.93 $中，并且在$ s> s_ {0} $中完全稳定。也构建了稳定的涡旋孤子。我们还考虑轴向和横向方向上的3D孤子之间的碰撞。相互作用是准弹性的，包括在横向平面上执行班车运动的孤子之间的周期性碰撞。
We develop the scheme of dispersion management (DM) for three-dimensional (3D) solitons in a multimode optical fiber. It is modeled by the parabolic confining potential acting in the transverse plane in combination with the cubic self-focusing. The DM map is adopted in the form of alternating segments with anomalous and normal group-velocity dispersion. Previously, temporal DM solitons were studied in detail in single-mode fibers, and some solutions for 2D spatiotemporal "light bullets", stabilized by DM, were found in the model of a planar waveguide. By means of numerical methods, we demonstrate that stability of the 3D spatiotemporal solitons is determined by the usual DM-strength parameter, $S$: they are quasi-stable at $ S<S_{0}\approx 0.93$, and completely stable at $S>S_{0}$. Stable vortex solitons are constructed too. We also consider collisions between the 3D solitons, in both axial and transverse directions. The interactions are quasi-elastic, including periodic collisions between solitons which perform shuttle motion in the transverse plane.
