Free-space optical communications using orbital-angular-momentum multiplexing combined with MIMO-based spatial multiplexing
Free-space optical communications using orbital-angular-momentum multiplexing combined with MIMO-based spatial multiplexing
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DOI：
10.1364/ol.40.004210
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发表时间：
2015-09-15
期刊：
影响因子：
3.6
通讯作者：
Willner, Alan E.
中科院分区：
文献类型：
--
作者：
Ren, Yongxiong;Wang, Zhe;Willner, Alan E.
我们探索将基于多输入多输出（MIMO）的空间复用的优点与轨道角动量（OAM）复用的优点相结合以增加自由空间光（FSO）通信容量的潜力。我们通过实验演示了具有 2 x 2 孔径架构的 80 Gbit/s FSO 系统，其中每个发射器孔径包含两个复用数据承载 OAM 模式。通过 OAM 波束固有的正交性和 4 x 4 MIMO 信号处理的使用，通道间串扰效应得以最小化。我们的实验结果表明，经过MIMO处理后，所有通道的误码率可以达到3.8 x 10(-3)的前向纠错极限以下，并且功率损失小于3.6 dB。这表明可以同时利用 OAM 和基于 MIMO 的空间复用，从而提供增强系统性能的潜力。 (C) 2015年美国光学学会
We explore the potential of combining the advantages of multiple-input multiple-output (MIMO)-based spatial multiplexing with those of orbital angular momentum (OAM) multiplexing to increase the capacity of free-space optical (FSO) communications. We experimentally demonstrate an 80 Gbit/s FSO system with a 2 x 2 aperture architecture, in which each transmitter aperture contains two multiplexed data-carrying OAM modes. Inter-channel crosstalk effects are minimized by the OAM beams' inherent orthogonality and by the use of 4 x 4 MIMO signal processing. Our experimental results show that the bit-error rates can reach below the forward error correction limit of 3.8 x 10(-3) and the power penalties are less than 3.6 dB for all channels after MIMO processing. This indicates that OAM and MIMO-based spatial multiplexing could be simultaneously utilized, thereby providing the potential to enhance system performance. (C) 2015 Optical Society of America