Optical communications using orbital angular momentum beams
Optical communications using orbital angular momentum beams
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DOI：
10.1364/aop.7.000066
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发表时间：
2015-03-01
影响因子：
27.1
通讯作者：
Ashrafi, S.
中科院分区：
文献类型：
--
作者：
Willner, A. E.;Huang, H.;Ashrafi, S.
轨道角动量（OAM）描述了光束的“相位扭转”（螺旋相位模式），由于其在许多不同领域的潜在应用，最近受到了关注。特别有前景的是OAM在光通信中的应用，因为：（i）具有不同方位角OAM态的同轴传播OAM光束是相互正交的；（ii）光束间的串扰可以最小化；（iii）光束可以有效地复用和解复用。因此，多个OAM态可用作不同的载波来复用和传输多个数据流，从而有可能提高系统容量。在本文中，我们回顾了OAM光束产生/检测、复用/解复用方面的最新进展，以及它在包括自由空间光通信、光纤通信和射频通信等不同场景中的潜在应用。还讨论了OAM光束面临的技术挑战和前景。（C）2015美国光学学会
Orbital angular momentum (OAM), which describes the "phase twist" (helical phase pattern) of light beams, has recently gained interest due to its potential applications in many diverse areas. Particularly promising is the use of OAM for optical communications since: (i) coaxially propagating OAM beams with different azimuthal OAM states are mutually orthogonal, (ii) inter-beam crosstalk can be minimized, and (iii) the beams can be efficiently multiplexed and demultiplexed. As a result, multiple OAM states could be used as different carriers for multiplexing and transmitting multiple data streams, thereby potentially increasing the system capacity. In this paper, we review recent progress in OAM beam generation/detection, multiplexing/demultiplexing, and its potential applications in different scenarios including free-space optical communications, fiber-optic communications, and RF communications. Technical challenges and perspectives of OAM beams are also discussed. (C) 2015 Optical Society of America