Abstract

We studied the field structure and 3-D propagation on diffraction of a multi circular segment-shaped laser beam. Diffraction of a laser beam with the shape of the multi circular segments (two, four and six) was investigated. We have observed for the first time the Mathieu–Gauss (MG)-like spatial modes formation and its propagation in the slow-expansion mode. The fundamental difference between diffraction of the multi-segments’ laser beams from the well-known MG beams is the large propagation distance (meters) in the slow-expansion mode without using a focusing lens.

Graphical abstract

中文翻译：

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Mathieu-Gauss型空间结构在多节形激光束衍射上的形成和传播

摘要

我们研究了多圆扇形激光束的场结构和3-D传播。研究了具有多个圆形段（两个，四个和六个）形状的激光束的衍射。我们首次观察到类似Mathieu-Gauss（MG）的空间模式的形成及其在慢扩展模式下的传播。多段激光束与众所周知的MG光束的衍射之间的根本区别在于，在不使用聚焦透镜的情况下，慢速扩展模式下的传输距离（米）大。

图形概要