【摘要】 涡旋光场可以携带任意大小的光子轨道角动量，理论上能够形成无限维的希尔伯特空间。这些轨道角动量模式之间相互正交，可以作为一个新的自由度，成为信息传输的独立通道。通过多个轨道角动量之间的模分复用技术可以提高光通信系统中的通信容量和频谱利用率，因此携带轨道角动量的涡旋光场在大容量自由空间光通信及水下光通信中具有广泛的应用。本文回顾了涡旋光场在自由空间及水下通信中的应用研究，介绍了湍流相位屏模型和自适应光学技术，并对使用自适应光学技术的相位补偿降低自由空间及水下通信中随机介质扰动的研究进行了阐述。更多还原

【Abstract】 The photon orbital angular momentum of any size carried by a vortex beam can theoretically form an infinite dimensional Hilbert space. These orbital angular momentum modes are orthogonal to each other, and they are becoming an independent channel for information propagation as a new degree of freedom. The mode division multiplexing technology based on multiple orbital angular momentum can be used to improve the communication capacity and spectral efficiency in optical communication systems. Therefore, vortex beams carrying orbital angular momentum have been applied in free space and underwater optical communications widely. In this article, we review the research progress of vortex beams in free space and underwater optical communications, introduce the turbulent phase screen model and adaptive optics technology, elaborate on the study of using adaptive optics technology for phase compensation to reduce random medium disturbances in free space and underwater optical communications.更多还原