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首页> 外文会议>Laser optics 2010 >Creation of a single and quadrupole optical vortices by light focused by a two-component crystal-optics element: prediction of an octupole vortex structure
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Creation of a single and quadrupole optical vortices by light focused by a two-component crystal-optics element: prediction of an octupole vortex structure

机译：由两组分晶体光学元件聚焦的光产生的单极和四极光学涡流：八极涡结构的预测

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摘要

In the neighborhood of the cusp of the "double" caustic produced by the y- polarized convergent eo- and ee- beams, a single isolated optical vortex was found to exist. The observed single vortices are formed only under four strictly defined angular orientations of the incident collimated light beam relative to the entrance face of two-component crystal-optics element (TCE). As the direction of propagation of a collimated laser beam striking normally the TCE is reversed, a distinct localized quadrupole optical vortex consisting of four closely spaced vortices with pairwise-opposite topological charges -1, +1, +1, and -1 forms close to the cusp of this caustic (diffraction catastrophe). The analysis of quadrupole vortex formed by TCE was done for comparative purpose because both vortex fields are formed near the corresponding paraxial foci by the same crystal-optical element.
机译：在由y偏振会聚光学光束和ee光束产生的“双重”苛性碱的尖端附近，发现存在一个孤立的光学涡旋。观察到的单个涡流仅在入射准直光束相对于两组分晶体光学元件（TCE）入射面的四个严格定义的角度方向下形成。当准直TCE的准直激光束的传播方向反向时，由四个紧密间隔的涡旋组成的独特的局部四极光学涡流与成对相反的拓扑电荷-1，+ 1，+ 1和-1形成接近这种苛刻（衍射灾难）的风口浪尖。出于比较目的，对由TCE形成的四极涡旋进行了分析，因为两个涡旋场都是由同一晶体光学元件在相应的近轴焦点附近形成的。

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