Figure 9. Received optical power Prec as a function of the beam divergence angle θdiv for a transmitted power Ptx = 20 dBm. Increasing beam divergence leads to a rapid decrease in received power. The Sech profile maintains higher received power compared to the other beam profiles

From

Evaluation of Pulse Shapes on the Reception Performance of an FSO-WDM-PolSK System

Amadou Soumahoro, Douatia Koné, Aladji Kamagaté

International Journal of Physics. 2025, 13(4), 80-90 doi:10.12691/ijp-13-4-1