Pan Yuqi, Dou Jiantai, Xu Jiaqing, Li Bo, Hu Youyou
J Opt Soc Am A Opt Image Sci Vis. 2024 Feb 1;41(2):283-287. doi: 10.1364/JOSAA.511849.
In this paper, the generation and propagation properties of Bessel-Gaussian (BG) rotationally symmetric power-exponent-phase vortex beam (RSPEPVBs) were demonstrated and discussed. The results showed that the BG-RSPEPVBs can be directly generated based on the spatial light modulator, of which the phase singularities were verified by the interference patterns with the plane wave. It can be found that the intensity distributions of the BG-RSPEPVBs, with different topological charges (TCs) and power orders, were fan-shaped and polycyclic, which possessed the characteristics of BG beams and RSPEPVBs, simultaneously. Thus, the propagation invariance of the BG-RSPEPVBs is better than that of Laguerre-Gaussian RSPEPVBs and RSPEPVBs. Moreover, the focusing spot of the BG-RSPEPVBs would evolve into a bright ring with the same ring radius at the focal plane, which is independent of the TC and more suitable for the applications of optical coupling, optical communication, optical trapping, and so on.
本文对贝塞尔 - 高斯（BG）旋转对称幂指数相位涡旋光束（RSPEPVBs）的产生和传播特性进行了论证与讨论。结果表明，BG - RSPEPVBs可基于空间光调制器直接产生，其相位奇点通过与平面波的干涉图样得到验证。可以发现，具有不同拓扑电荷（TCs）和幂次的BG - RSPEPVBs的强度分布呈扇形和多环状，同时具备BG光束和RSPEPVBs的特征。因此，BG - RSPEPVBs的传播不变性优于拉盖尔 - 高斯RSPEPVBs和RSPEPVBs。此外，BG - RSPEPVBs的聚焦光斑在焦平面处会演变成具有相同环半径的亮环，该环半径与拓扑电荷无关，更适用于光耦合、光通信、光捕获等应用。
