Title: Probing Optical Vortex Beams via a Controllable Anisotropic Diffractive Phase Element Show Chinese title

Title: 通过可控制的各向异性衍射相位元件探测光学涡旋光束

Abstract: In this work, we investigate the diffraction of optical vortex beams through a tunable elliptical Fresnel phase mask (TEFPM). The resulting diffraction patterns are influenced by both the topological charge of the beam and the ellipticity of the mask, exhibiting characteristic intensity distributions that allow direct determination of the magnitude and sign of the topological charge. Requiring only a single controllable parameter, the TEFPM offers a simple and adaptable approach for vortex charge characterization, with a reduced detection distance that supports optical system compactness. The experimental results are confirmed by the exact analytical solutions. Show Chinese abstract

Abstract: 在本工作中，我们研究了光学涡旋光束通过可调椭圆菲涅尔相位掩模（TEFPM）的衍射。 产生的衍射图样受光束的拓扑电荷和掩模的椭圆率的影响，表现出允许直接确定拓扑电荷大小和符号的特征强度分布。 TEFPM只需要一个可控制的参数，为涡旋电荷表征提供了一种简单且适应性强的方法，其减少的检测距离支持光学系统的紧凑性。 实验结果得到了精确解析解的验证。