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The conversion of a Li's flat-topped-Gaussian beam to a superposition of Kummer dark hollow beam by the illumination of a fractional radial Hilbert transform system

机译:通过分数径向希尔伯特变换系统的照明,将李的平顶高斯光束转换为库默暗空心光束的叠加

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摘要

A new method of the generation of superposition of Kummer beam is introduced by the illumination of a fractional radial Hilbert transform (FRHT) system with an aper-tured spiral phase plate (SPP) instrument by a Li's flattened Gaussian (LFTG) beam. To study the propagation properties of the produced beam, two main approximate analytical expressions are developed. The first one concerns the SPP integer topological charges and the second one is about the non-integer ones. From the both principle formulas devoted, some studies about the generation of the Kummer beam, with integer and non-integer topological charges, by the conversion of a fundamental Gaussian beam and the propagation of the LFTG beams through a FRHT system without apertured SPP are deduced in this work as special investigations of the main studies. For reason to determine the effects of the incident beam parameters and the optical system coefficients on the propagation characteristics of the created beam, several numerical calculations are carried out, analyzed and discussed in the work. Simples concluding remarks are outlined in the end of the paper.
机译:通过用李氏扁平高斯(LFTG)光束用开孔螺旋相位板(SPP)仪器照射分数径向希尔伯特变换(FRHT)系统,引入了一种生成库默光束叠加的新方法。为了研究所产生光束的传播特性,建立了两个主要的近似解析表达式。第一个与SPP整数拓扑电荷有关,第二个与非整数电荷有关。从两个专门的公式,推论了有关通过基本高斯光束的转换以及LFTG光束通过无孔SPP的FRHT系统的传播而产生具有整数和非整数拓扑电荷的Kummer光束的研究。在这项工作中作为主要研究的特殊调查。为了确定入射光束参数和光学系统系数对所产生光束的传播特性的影响,在工作中进行了一些数值计算,分析和讨论。本文末尾概述了简单的结论。

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