论文标题
多模光纤中的任意空间模式排序
Arbitrary spatial mode sorting in a multimode fiber
论文作者
论文摘要
分类空间光学模式是一个关键挑战，它是从超级分辨成像到高维量子键分布的许多应用程序。但是，迄今为止，光学模式分角的实现仅在特定的模式集（例如携带轨道角动量的模式）上运行，因此在任意空间基础上对操作缺乏多功能性。在这里，我们通过利用在多模纤维中通过波前形状来利用在光传播期间发生的随机模式混合过程来证明一个任意的空间模式分隔器。通过测量光纤的传输矩阵，我们显示了傅立叶，laguerre-gaussian的最高$ 25 $横向空间模式，以及在输出处的任意位置的随机基础。我们的方法提供了一个空间模式的词程序，该连锁符紧凑，易于制作，可编程且可在任何空间基础上使用，这对于量子和经典信息科学都是有希望的。
Sorting spatial optical modes is a key challenge that underpins many applications from super-resolved imaging to high-dimensional quantum key distribution. However, to date implementations of optical mode sorters only operate on specific sets of modes, such as those carrying orbital angular momentum, and therefore lack versatility with respect to operation with an arbitrary spatial basis. Here, we demonstrate an arbitrary spatial mode sorter by harnessing the random mode mixing process occurring during light propagation in a multimode fibre by wavefront shaping. By measuring the transmission matrix of the fibre, we show sorting of up to $25$ transverse spatial modes of the Fourier, Laguerre-Gaussian and a random basis to an arbitrary set of positions at the output. Our approach provides a spatial mode sorter that is compact, easy-to-fabricate, programmable and usable with any spatial basis, which is promising for quantum and classical information science.
