Abstract

Ultraviolet (UV) light communication has several advantages, including strong anti-interference ability, all-weather operation, and covert communications. In this paper, we built a landing assistance system for an unmanned aerial vehicle (UAV). In addition, we derived the formula of Lambertian power for UV LED. This formula is compared to the traditional line-of-sight (LOS) UV power formula in consideration of not only the area of the receiving aperture, but also the divergence angle of the UV LED. The simulation results show that with the increase of the receiver angle, the larger the divergence angle of the UV LED, the faster the UV power attenuation. When the receiver is not in the direction of the light source normal and the angle is fixed, there will be an optimal Lambertian order to make the receiver receive the maximum optical power at this angle. Finally, we did a set of outdoor experiments, which verified the correctness of the theoretical results.

© 2020 Optical Society of America

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