School of Engineering, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK.
School of Electrical and Information Engineering, University of the Witwatersrand, Johannesburg, South Africa.
Sci Rep. 2019 Dec 23;9(1):19687. doi: 10.1038/s41598-019-55670-1.
Free-Space Optical (FSO) systems offer the ability to distribute high speed digital links into remote and rural communities where terrain, installation cost or infrastructure security pose critical hurdles to deployment. A challenge in any point-to-point FSO system is initiating and maintaining optical alignment from the sender to the receiver. In this paper we propose and demonstrate a low-complexity self-aligning FSO prototype that can completely self-align with no requirement for initial manual positioning and could therefore form the opto-mechanical basis for a mesh network of optical transceivers. The prototype utilises off-the-shelf consumer electrical components and a bespoke alignment algorithm. We demonstrate an eight fibre spatially multiplexed link with a loss of 15 dB over 210 m.
自由空间光（FSO）系统能够将高速数字链路分布到偏远和农村社区，在这些地区，地形、安装成本或基础设施安全对部署构成了关键障碍。在任何点对点 FSO 系统中，都存在一个挑战，即从发送器到接收器发起和维持光对准。在本文中，我们提出并展示了一种低复杂度的自对准 FSO 原型，它可以完全自动对准，不需要初始手动定位，因此可以成为光收发器网状网络的光电机械基础。该原型利用现成的消费电子产品和定制的对准算法。我们演示了一个八光纤空间复用链路，在 210 米的距离上损耗为 15dB。
