Mr. Patrick De La Llana Profile

Patrick De La Llana

at Univ of Central Florida

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Proceedings Article | 10 March 2021 Presentation + Paper

Design of a multi-element FSO transceiver array for mobile communication links

Patrick De La Llana, A F M Saniul Haq, Murat Yuksel

Proceedings Volume 11678, 1167805 (2021) https://doi.org/10.1117/12.2582633

KEYWORDS: Transceivers, Multi-element lenses, Mobile communications, Free space optics, Free space optical communications, Transmitters, Receivers, Prototyping, Optical components

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Free-space optical communication (FSOC) have directional light beams which makes communication links very sensitive to movement. A major challenge in mobile settings is handling of this fragility of FSOC links due to the highly directional distribution of light intensity within the light beams. Differing from previous studies using mechanical steering of the transceivers to remedy the brittleness of FSOC links, we use a square array of stationary elements for each transceiver for better directionality, optimum combination of elements (transmitter/receiver ratio along with location), and robustness to mobility. Based on previous studies showing the optimum transmit to receive area ratio in a square array layout, we locate the transmitters as a box around the center with extra elements on the four corners of the transceiver plane with the rest of the elements on the array being receivers. We design a hardware prototype using the same optimum transmit/receive ratio and a lOxlO square array layout with size, weight and power, cost, and geometric simplicity appropriate for a low-flying multi-copter drone. A full link margin analysis was completed for the lOxlO array, using commercial off-the-shelf components, with the same optimum transmit and receive combination. The range for the system was found to be rv 150 m operating at 1 Mbps. The outcome of this work will give us insight of how the tiling of transmit/receive elements affects a transceiver system to implement a directional wireless link in the optical spectrum for mobile settings, particularly for emerging use of low-flying drones.

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