Figure 4 | Scientific Reports

Figure 4

From: High-Capacity Free-Space Optical Communications Between a Ground Transmitter and a Ground Receiver via a UAV Using Multiplexing of Multiple Orbital-Angular-Momentum Beams

Figure 4

Effects of propeller-induced airflow on system performance. (a) and (b) Measured power distribution when the UAV’s propellers are turned off or on, respectively. The power is normalized to its mean during the measurement. (c) Measured OAM spectrum when the UAV’s propellers are turned off and on, when OAM +1 is transmitted over ~100 m roundtrip.

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