标题： 光学涡旋在塔尔博特干涉仪中的研究 显示英文标题

标题： A study of optical vortices inside the Talbot interferometer

摘要： 光学塔尔博特干涉仪已被用于探索光涡旋的拓扑电荷。 我们在近场区域记录了具有多个拓扑电荷的光涡旋的衍射光栅自成像。 我们的扭曲光是由空间光调制器（SLM）产生的。 以前的研究表明，干涉方法可以确定特定的轨道角动量（OAM）状态，但大量的OAM本征值难以从干涉图样中区分。 在这里，我们展示了塔尔博特图样可以区分高阶涡旋的电荷和OAM。 由于塔尔博特效应的高灵敏度和自成像特性，可以通过直接测量区分多个OAM本征值。 我们通过理论验证了实验结果。 目前的结果对于经典和量子计量以及未来量子通信的实现是有用的。 显示英文摘要

摘要： The optical Talbot interferometer has been used to explore the topological charges of optical vortices. We recorded the self-imaging of a diffraction grating in the near-field regime with the optical vortex of several topological charges. Our twisted light was generated by a spatial light modulator (SLM). Previous studies showed that interferometric methods can determine the particular orbital angular momentum (OAM) states, but a large number of OAM eigenvalues are difficult to distinguish from the interference patterns. Here, we show that the Talbot patterns can distinguish the charges as well as the OAM of the vortices with high orders. Owing to high sensitivity and self-imaging of Talbot effect, several OAM eigenvalues can be distinguished by direct measurement. We assure the experimental results with our theory. The present results are useful for classical and quantum metrology as well as future implementations of quantum communications.