Wang Chen, Ren Yuan, Liu Tong, Luo Chuankai, Qiu Song, Li Zhimeng, Wu Hao
Appl Opt. 2020 May 1;59(13):4040-4047. doi: 10.1364/AO.389617.
We investigate a method for the generation and measurement of high-order optical vortices (OVs) by using the cross phase (CP), which is applied to implement interconversion between Laguerre-Gauss (LG) beams and Hermite-Gaussian beams in the far-field. Experimentally, we generate LG beams, which are a kind of typical OVs, with 20 radial nodes, and measure OVs with topological charges up to 200 via the CP. On this basis, we discuss the relationship between intensity distributions and the waist radius of initial light beams. This work provides an alternative method to generate and measure high-order OVs, which is useful in the fields of optical micro-manipulation, high-dimensional quantum entanglement, and remote sensing of the angular rotation of structured objects.
我们研究了一种利用交叉相位（CP）产生和测量高阶光学涡旋（OVs）的方法，该方法用于在远场实现拉盖尔 - 高斯（LG）光束与厄米 - 高斯光束之间的相互转换。通过实验，我们生成了具有20个径向节点的LG光束（一种典型的OVs），并通过CP测量了拓扑电荷高达200的OVs。在此基础上，我们讨论了强度分布与初始光束腰半径之间的关系。这项工作提供了一种产生和测量高阶OVs的替代方法，在光学微操纵、高维量子纠缠以及结构化物体角旋转的遥感等领域具有重要应用。
