A space division multiplexed free-space-optical communication system that can auto-locate and fully self align with a remote transceiver

Abadi, Mojtaba, Cox, Mitchell A., Alsaigh, Rakan E., Viola, Shaun, Forbes, Andrew and Lavery, Martin P. J. (2019) A space division multiplexed free-space-optical communication system that can auto-locate and fully self align with a remote transceiver. Scientific Reports, 9 (1). p. 19687. ISSN 2045-2322

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Abstract

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.

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